I'm wondering if anyone else is or has been experiencing this issue. For the last couple weeks my black Pixel 2XL 128gig on Android 8.0 is having a problem switching from LTE to HSPA when trying to make a phone call. I've been on the phone with both Google and AT&T numerous times. ATT deactivated and reactivated my sim card. I ended up getting a new sim card and still didn't fix the problem. Google eventually sent me a brand new phone and I'm still having the same problem. Now Google wants to send me another new phone. I had the original pixel XL on ATT and did not have this issue at all. Anyone else having a similar issue?
Uh... Yes, that's normal, you don't have VoLTE enabled. There's a whole thread about enabling it with AT&T here on the boards. TLR of that thread, download the Oreo 8.1 beta, enable VoLTE in the software, talk to AT&T to enable enhanced voice features.
Sent from my Pixel 2 XL using Tapatalk
You may need a new sim card, I had similar issues, visited an AT&T store and it was fixed within five minutes.
dratsablive said:
You may need a new sim card, I had similar issues, visited an AT&T store and it was fixed within five minutes.
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Click to collapse
I did get a new SIM card. Still was experiencing the same problem. I updated to 8.1 beta to and enabled enhanced LTE to see if that fixes the issue.
JaredC01 said:
Uh... Yes, that's normal, you don't have VoLTE enabled. There's a whole thread about enabling it with AT&T here on the boards. TLR of that thread, download the Oreo 8.1 beta, enable VoLTE in the software, talk to AT&T to enable enhanced voice features.
Click to expand...
Click to collapse
It definitely was not normal. I had a the first pixel XL before this and did not experience this issue.
dutchy716 said:
It definitely was not normal. I had a the first pixel XL before this and did not experience this issue.
Click to expand...
Click to collapse
Then somehow you had VoLTE on your first Pixel. Without VoLTE, the phone will 100% of the time kick back out to HSPA+ when you make a phone call. That's been the case with every phone I've owned prior to VoLTE and actually having a phone that had and made use of VoLTE.
Sent from my Pixel 2 XL using Tapatalk
JaredC01 said:
Then somehow you had VoLTE on your first Pixel. Without VoLTE, the phone will 100% of the time kick back out to HSPA+ when you make a phone call. That's been the case with every phone I've owned prior to VoLTE and actually having a phone that had and made use of VoLTE.
Click to expand...
Click to collapse
I know it's supposed to kick back to HSPA when making a phone call. The problem is that it doesn't. Instead of going to HSPA I lose signal completely. The phone will try to make the phone call and then the phone will manually hang up like I hit the end call button but it does it automatically. Then I either have to toggle airplane mode or reboot the phone to get LTE again.
dutchy716 said:
I know it's supposed to kick back to HSPA when making a phone call. The problem is that it doesn't. Instead of going to HSPA I lose signal completely. The phone will try to make the phone call and then the phone will manually hang up like I hit the end call button but it does it automatically. Then I either have to toggle airplane mode or reboot the phone to get LTE again.
Click to expand...
Click to collapse
Ah ha, your original post didn't make it sound like that. In that case, maybe try a new SIM card?
Edit: Re-read the first post and you already tried a new SIM. Have you tried a SIM from someone else, maybe on another Network to see if it's the phone or the network?
JaredC01 said:
Ah ha, your original post didn't make it sound like that. In that case, maybe try a new SIM card?
Click to expand...
Click to collapse
Ya I got a new SIM the other day. I talked to jcase about it and he believes it's a provisioning issue on AT&Ts end. I was just wondering if anyone else has experienced this and if they found a solution to it. I did end up upgrading to 8.1 beta and that obviously fixed it because of enhanced calling. It's just weird because I haven't found anybody else who has had this problem.
dutchy716 said:
I'm wondering if anyone else is or has been experiencing this issue. For the last couple weeks my black Pixel 2XL 128gig on Android 8.0 is having a problem switching from LTE to HSPA when trying to make a phone call. I've been on the phone with both Google and AT&T numerous times. ATT deactivated and reactivated my sim card. I ended up getting a new sim card and still didn't fix the problem. Google eventually sent me a brand new phone and I'm still having the same problem. Now Google wants to send me another new phone. I had the original pixel XL on ATT and did not have this issue at all. Anyone else having a similar issue?
Click to expand...
Click to collapse
One thing you should always try before going to the provider is a safe mode boot. I tried a new rom and could not get data. Most things worked but no data. I could call and WIFI but no cellular data. In safe mode I got data. That tells you some third party APP is responsible.
JaredC01 said:
Then somehow you had VoLTE on your first Pixel. Without VoLTE, the phone will 100% of the time kick back out to HSPA+ when you make a phone call. That's been the case with every phone I've owned prior to VoLTE and actually having a phone that had and made use of VoLTE.
Sent from my Pixel 2 XL using Tapatalk
Click to expand...
Click to collapse
What does VoLTE have to do having LTE data while on a call? I don't see any reason why you couldn't have LTE available for data even when it doesn't support LTE for voice calls.
I've had LTE switch to H every time I've made a phone call on my Nexus 5, Nexus 5X and Pixel 2 XL. Since 8.1 I've had VoLTE. I know because when I make a call I see the "HD" which is VoLTE but the LTE still switches to H so it seems like the two are related.
jimv1983 said:
What does VoLTE have to do having LTE data while on a call?
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Click to collapse
Uhm, everything? VoLTE is Voice over LTE which implies that you have an LTE radio connection (as opposed to a UMTS/WCDMA/HS*PA radio connection).
jimv1983 said:
I don't see any reason why you couldn't have LTE available for data even when it doesn't support LTE for voice calls.
Click to expand...
Click to collapse
That's because you don't understand the fundamental way in which cellular networks work. Don't feel bad - you're not alone; it's a complicated topic.
The radio on your device can only support one type of radio connection at a time. There are a multitude of reasons for this: capacity on the chip, the need for multiple amplifiers to work simultaneously (because typically carriers use different parts of the radio spectrum for one Radio Access Type than another), antenna capacity etc. Keep in mind that are scenarios in which your device is already juggling quasi multiple radio connects, e.g. carrier aggregation.
Don't get me wrong, there have been devices that supported multiple simultaneous radio access technologies on a single device, but that's because they had multiple radios. These were older devices on IS-95 CDMA carriers such a Sprint when they were pushing WIMAX, and even I believe some Verizon devices which allowed them to do multi-RAB for simultaneous voice and calls before their CDMA infrastructure was upgraded to allow this (and prior to their VoLTE launch). These devices are few and far between.
One last point on this topic: the network handles handover between RATs (though it's possible for the device to only support one RAT). If you were allowed to have simultaneous connections to two radio access types, the network would be juggling twice the resources for your device (the transmit and receive portion of a data connection or call is not the only resource involved). This is yet another reason why in most circumstances you'll never see two simultaneous RATs for one device: it costs the network money. Unless you're trying to cover up for a deficiency is your network architecture (e.g. IS-95 CDMA networks lack of support for multi-RAB. Multi-RAB refers to radio access bearers, basically multiple virtual connections across a single radio link. You might think of this like VLANs on an ethernet network.) you don't put the network and engineering expenses to support multiple RATs..
jimv1983 said:
I've had LTE switch to H every time I've made a phone call on my Nexus 5, Nexus 5X and Pixel 2 XL. Since 8.1 I've had VoLTE. I know because when I make a call I see the "HD" which is VoLTE but the LTE still switches to H so it seems like the two are related.
Click to expand...
Click to collapse
Actually, no. "HD" stands for "HD Voice" which is a better codec. Depending on the carrier, you may get HD voice on a 3G RAT and VoLTE RAT or just on a VoLTE RAT. Keep in mind that HD Voice uses more radio resource than the standard GSM codecs, so there's a trade-off involved here. LTE is more spectral efficient, so offering the higher quality, higher bit rate voice codec on VoLTE has less of an impact on the network than offering it on VoLTE + 3G. So depending on your carrier, they may or may not allow the HD codec on non-VoLTE radio connections. Either way, HD does not in any way shape or form constitute having a VoLTE connection, since it's radio access type independent.
RomPlinker said:
Uhm, everything? VoLTE is Voice over LTE which implies that you have an LTE radio connection (as opposed to a UMTS/WCDMA/HS*PA radio connection).
That's because you don't understand the fundamental way in which cellular networks work. Don't feel bad - you're not alone; it's a complicated topic.
The radio on your device can only support one type of radio connection at a time. There are a multitude of reasons for this: capacity on the chip, the need for multiple amplifiers to work simultaneously (because typically carriers use different parts of the radio spectrum for one Radio Access Type than another), antenna capacity etc. Keep in mind that are scenarios in which your device is already juggling quasi multiple radio connects, e.g. carrier aggregation.
Don't get me wrong, there have been devices that supported multiple simultaneous radio access technologies on a single device, but that's because they had multiple radios. These were older devices on IS-95 CDMA carriers such a Sprint when they were pushing WIMAX, and even I believe some Verizon devices which allowed them to do multi-RAB for simultaneous voice and calls before their CDMA infrastructure was upgraded to allow this (and prior to their VoLTE launch). These devices are few and far between.
One last point on this topic: the network handles handover between RATs (though it's possible for the device to only support one RAT). If you were allowed to have simultaneous connections to two radio access types, the network would be juggling twice the resources for your device (the transmit and receive portion of a data connection or call is not the only resource involved). This is yet another reason why in most circumstances you'll never see two simultaneous RATs for one device: it costs the network money. Unless you're trying to cover up for a deficiency is your network architecture (e.g. IS-95 CDMA networks lack of support for multi-RAB. Multi-RAB refers to radio access bearers, basically multiple virtual connections across a single radio link. You might think of this like VLANs on an ethernet network.) you don't put the network and engineering expenses to support multiple RATs..
Actually, no. "HD" stands for "HD Voice" which is a better codec. Depending on the carrier, you may get HD voice on a 3G RAT and VoLTE RAT or just on a VoLTE RAT. Keep in mind that HD Voice uses more radio resource than the standard GSM codecs, so there's a trade-off involved here. LTE is more spectral efficient, so offering the higher quality, higher bit rate voice codec on VoLTE has less of an impact on the network than offering it on VoLTE + 3G. So depending on your carrier, they may or may not allow the HD codec on non-VoLTE radio connections. Either way, HD does not in any way shape or form constitute having a VoLTE connection, since it's radio access type independent.
Click to expand...
Click to collapse
My Pixel 2 XL does VoLTE on AT&T. "HD" might have different meanings in different cases but in this case the "HD" does mean VoLTE. Google specifically stated that in release notes for 8.1 on the Pixel 2 XL.
Also, back when I had a Galaxy S2 Skyrocket (AT&T's LTE variant of the Galaxy S2 and its first LTE phone) back in late 2011 it didn't do VoLTE but it did allow LTE data while a voice call was in progress.
Related
Verizon has a Voice over LTE system coming out in the next year(according to them). That would allow the LTE radio to not just be used for sweet delicious data, but be used for voice(minutes?) too. Is this something that the current Galaxy Nexus will be capable of in the future via firmware update? This would solve some of the battery draining problems related to using a LTE phone. It would suck burro pene having a relatively new LTE phone and not be able to use Verizon's forthcoming VoLTE platform in a few months, if there is a huge benefit from it.
Pacifik said:
Verizon has a Voice over LTE system coming out in the next year(according to them). That would allow the LTE radio to not just be used for sweet delicious data, but be used for voice(minutes?) too. Is this something that the current Galaxy Nexus will be capable of in the future via firmware update? This would solve some of the battery draining problems related to using a LTE phone. It would suck burro pene having a relatively new LTE phone and not be able to use Verizon's forthcoming VoLTE platform in a few months, if there is a huge benefit from it.
Click to expand...
Click to collapse
I don't see how using LTE for voice AND data will make battery life any better.
Chirality said:
I don't see how using LTE for voice AND data will make battery life any better.
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Click to collapse
turn off the CDMA radio completely?
crazy talk said:
turn off the CDMA radio completely?
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Click to collapse
The LTE radio is the one that burns the battery, not the CDMA radio. So once you start doing voice and data both over LTE its gonna rape the battery lol.
Currently you get a call it's handed off to the CDMA antenna. When on LTE both the CDMA for voice and LTE for data are on. Whereas with VoLTE while on LTE there is no hand off, therefore no secondary voice antenna needs to be on as the LTE handles it.
Pacifik said:
Currently you get a call it's handed off to the CDMA antenna. When on LTE both the CDMA for voice and LTE for data are on. Whereas with VoLTE while on LTE there is no hand off, therefore no secondary voice antenna needs to be on as the LTE handles it.
Click to expand...
Click to collapse
That's not true at all. When the CDMA radio is on for voice communication it turns *off* the LTE radio. We know this because voice and data at the same time are not possible on most LTE phones.
If you used the LTE radio for voice communication, as well as data, it would *completely* destroy your battery life.
hotleadsingerguy said:
That's not true at all. When the CDMA radio is on for voice communication it turns *off* the LTE radio. We know this because voice and data at the same time are not possible on most LTE phones.
If you used the LTE radio for voice communication, as well as data, it would *completely* destroy your battery life.
Click to expand...
Click to collapse
On Verizon LTE phones you can 100% definitely use 4g data while on 3g voice, most can't do 3g simultaneous voice and data. While LTE ants use more power, powering up a second antenna while already using the LTE will hurt even more. There will also be usually be an increase in call quality on an LTE call. All of this is under the assumption you actually plan on using the 4G network.
Important question that needs an answer
I too am considering getting the new Galaxy Nexus on VZ. The battery issue I find secondary to my main concern, but it should be obvious that using only one radio (LTE) will have power saving benefits vs two radios. If just using voice, it may be a net loss of battery life. I guess we'll see how LTE stacks up to CDMA power consumption.
But here is the important question: will the SGN be upgradeable to support VoLTE (Voice over LTE) and the accompanying high-definition audio codec AMR-WB. You see, your horrible-sounding cell calls will transform to sounding better than a land line (assuming, of course, a compatible phone on the other end). It is even conceivable one could call VoIP landlines that support this codec and get good audio quality.
So you see, it is really all about the audio quality. Battery life is secondary, and may go up or down depending on your useage of voice only or voice and data.
[email protected] said:
I too am considering getting the new Galaxy Nexus on VZ. The battery issue I find secondary to my main concern, but it should be obvious that using only one radio (LTE) will have power saving benefits vs two radios. If just using voice, it may be a net loss of battery life. I guess we'll see how LTE stacks up to CDMA power consumption.
But here is the important question: will the SGN be upgradeable to support VoLTE (Voice over LTE) and the accompanying high-definition audio codec AMR-WB. You see, your horrible-sounding cell calls will transform to sounding better than a land line (assuming, of course, a compatible phone on the other end). It is even conceivable one could call VoIP landlines that support this codec and get good audio quality.
So you see, it is really all about the audio quality. Battery life is secondary, and may go up or down depending on your useage of voice only or voice and data.
Click to expand...
Click to collapse
If the wideband voice codec is implemented in hardware, then sure it can be a software upgrade. Otherwise its up to the CPU to do all the processing which isn't ideal. Still could be done though, just not in an optimal fashion.
the downsides outweigh the very small benefits. yeah, just using a lte antenna and turning off cdma will net you a small gain, but having lte on 24/7 will burn through the battery quickly and using it for voice just to gain a little clarity will still burn through the battery, just now you're using more power compared to cdma voice. nice try though.
pukemon said:
the downsides outweigh the very small benefits. yeah,
Click to expand...
Click to collapse
Then get a CDMA phone and keep having your phone conversations in low-def. Each to their own.
Personally, I absolutely despise cellphone audio quality (what? What did you say?) and will gladly burn a few extra milliamps, if indeed there is much of a penalty, for the few minutes I am actually talking on the phone.
---------- Post added at 04:41 PM ---------- Previous post was at 04:37 PM ----------
aadvanced1 said:
If the wideband voice codec is implemented in hardware, then sure it can be a software upgrade. Otherwise its up to the CPU to do all the processing which isn't ideal. Still could be done though, just not in an optimal fashion.
Click to expand...
Click to collapse
My understanding is that the voice codec must be in the modem firmware. Supposedly, from what I have read on the internet, the SGN uses the same SGS Thomson modem as the Samsung Galaxy II, which is capable of VoLTE. Again, reading on the internet, VZ has specifically asked Samsung (this was noted in the FCC filing) to ship it without VoLTE, presumably for better compatibility with their network today.
So, the million dollar question is: Is this just a firmware upgrade to enable when VoLTE goes live on VZ? Pretty sure modem firmware is different from Android OS. Not sure if it is upgradeable after the fact. Is this what is commonly refered to as "baseband firmware"?
Does anybody know more about the guts of these phones?
pass. i'll stick to gsm for a while longer. much longer. much better on the battery, call quality is satisfactory and i can travel with it. when lte power consumption is comparable to that of current hspa/cdma radios i might consider switching. until then i'm going to try and make my nexus last a couple years.
[email protected] said:
Then get a CDMA phone and keep having your phone conversations in low-def. Each to their own.
Personally, I absolutely despise cellphone audio quality (what? What did you say?) and will gladly burn a few extra milliamps, if indeed there is much of a penalty, for the few minutes I am actually talking on the phone.
Click to expand...
Click to collapse
Totally agreed. Going from a cell conversation to a Skype to Skype call makes you realize how undescribably bad cell voice quality is.
here's the million dollar question: With voLTE, can I simultaneously use voice and data over 4g?
Pacifik said:
Verizon has a Voice over LTE system coming out in the next year(according to them). That would allow the LTE radio to not just be used for sweet delicious data, but be used for voice(minutes?) too. Is this something that the current Galaxy Nexus will be capable of in the future via firmware update? This would solve some of the battery draining problems related to using a LTE phone. It would suck burro pene having a relatively new LTE phone and not be able to use Verizon's forthcoming VoLTE platform in a few months, if there is a huge benefit from it.
Click to expand...
Click to collapse
It's a really good question. If I had to bet, I'd say yes. I'd bet they've got Samsung putting the codec into the modem firmware already. I'd bet their 4G device testing already includes VoLTE IMS along with one or two production test markets for VZW field testing. I think the odds are good. That said, they don't exactly advertise on the box:
"Supports VoLTE so in about 9 months your battery life won't completely suck and maybe you'll get HD audio if you're seriously lucky."
Samzebian said:
here's the million dollar question: With voLTE, can I simultaneously use voice and data over 4g?
Click to expand...
Click to collapse
Yes. You should be able to do this even without VoLTE using 3G voice and 4G data. Different radios.
Samzebian said:
here's the million dollar question: With voLTE, can I simultaneously use voice and data over 4g?
Click to expand...
Click to collapse
Voice over LTE treats the call as data, it's the same thing as a voip call essentially.
I read there are some issues with the Galaxy S6 and some newer phones on Verizon being unable to do native simultaneous voice + data. I think because of a limit of the # of radios and/or antennas. What can we expect with the 5X on VZW? Thank you!
All new phones can do simultaneous voice and data only with VoLTE or while connected to WiFi. When connected to LTE (and no VoLTE) or 3G data they will drop to CDMA 1X if a call comes in. This is because they only have one antenna pathway and one radio. If they had a separate radio for LTE (like done older phones) it would drain battery almost twice as fast since mobile connection is one of your larger battery users.
Sent from my Nexus 6 using Tapatalk
_Dennis_ said:
All new phones can do simultaneous voice and data only with VoLTE or while connected to WiFi. When connected to LTE (and no VoLTE) or 3G data they will drop to CDMA 1X if a call comes in. This is because they only have one antenna pathway and one radio. If they had a separate radio for LTE (like done older phones) it would drain battery almost twice as fast since mobile connection is one of your larger battery users.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Ugh, what I feared. How do people do Nav and have phone calls at the same time? Is this going to work with VZW VoLTE on day one? May have made sense to design with two radios and two antennas and only activate the second one when necessary?
hytekjosh said:
Ugh, what I feared. How do people do Nav and have phone calls at the same time? Is this going to work with VZW VoLTE on day one? May have made sense to design with two radios and two antennas and only activate the second one when necessary?
Click to expand...
Click to collapse
Any time LTE is on the second would have to be on, or it wouldn't be able to seamlessly take the call, so that wouldn't have worked.
If your call isn't very long navigation would still work fine, it caches a bit in case of signal drop. The other option would be to download the route ahead of time, Google can do it now I think.
I have a feeling it should have VoLTE though, which would give you voice and data.
http://www.droid-life.com/2015/03/1...e-and-data-now-works-on-nexus-6-with-verizon/
Sent from my Nexus 6 using Tapatalk
_Dennis_ said:
Any time LTE is on the second would have to be on, or it wouldn't be able to seamlessly take the call, so that wouldn't have worked.
If your call isn't very long navigation would still work fine, it caches a bit in case of signal drop. The other option would be to download the route ahead of time, Google can do it now I think.
I have a feeling it should have VoLTE though, which would give you voice and data.
http://www.droid-life.com/2015/03/1...e-and-data-now-works-on-nexus-6-with-verizon/
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Will the same limitations be on each carrier (ie. if I switch to AT&T I still need to use VoLTE for simultaneous voice + data)? Thank you!!
hytekjosh said:
Will the same limitations be on each carrier (ie. if I switch to AT&T I still need to use VoLTE for simultaneous voice + data)? Thank you!!
Click to expand...
Click to collapse
Nope, the way GSM and CDMA works are different. Say you don't have VoLTE and are on an LTE connection. The tower also has a spot for you on HSPDA and GSM if on Tmo or AT&T, or on CDMA if on Sprint or Verizon. If you get a call you fallback to HSPDA or GSM. A similar thing happens on CDMA. The difference is CDMA can't do voice and data on the same connection, GSM and HSPDA can do both.
Sent from my Nexus 6 using Tapatalk
_Dennis_ said:
Nope, the way GSM and CDMA works are different. Say you don't have VoLTE and are on an LTE connection. The tower also has a spot for you on HSPDA and GSM if on Tmo or AT&T, or on CDMA if on Sprint or Verizon. If you get a call you fallback to HSPDA or GSM. A similar thing happens on CDMA. The difference is CDMA can't do voice and data on the same connection, GSM and HSPDA can do both.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
Really wish phones included a Ev radio so this would not be an issue. I wonder if the voice quality/codec on AT&T has improved over the years? Last I used them their voice quality was far inferior to VZW. May be time to consider a carrier switch.
I've not had problems with voice quality, the few times I call on AT&T. They weren't as good as Sprint (their new network has simply amazing voice quality, and data was OK lol).
Mostly I use Google voice via hangouts to make calls, so the network data is more important then voice quality.
Sent from my Nexus 6 using Tapatalk
_Dennis_ said:
All new phones can do simultaneous voice and data only with VoLTE or while connected to WiFi. When connected to LTE (and no VoLTE) or 3G data they will drop to CDMA 1X if a call comes in. This is because they only have one antenna pathway and one radio. If they had a separate radio for LTE (like done older phones) it would drain battery almost twice as fast since mobile connection is one of your larger battery users.
Sent from my Nexus 6 using Tapatalk
Click to expand...
Click to collapse
How new? My S4 gets simultaneous voice/data on lte, but not on 3g. Are you sure you're right about this?
Well, the S4 is not a new phone. And yes I'm certain without advanced calling (or VoLTE) you will not have voice and data on LTE at the same time.
Sent from my Nexus 6 using Tapatalk
Something I'm just realizing...I have a lot of friends and offices that have cell phone amplifier / extender systems that only repeat 3G not LTE. With no 3G radio this phone will be only able to do 1x for voice/data?! I think its also crazy that pure data devices such as the MiFi/personal hotspots still include ability to do EvDo Rev A yet phones don't!
jackdubl said:
How new? My S4 gets simultaneous voice/data on lte, but not on 3g. Are you sure you're right about this?
Click to expand...
Click to collapse
The S4 had extra antennas unlike the newer phones because of VoLTE. The S4 had both radios on at the same time which eats more battery on a call with VoLTE you have improved battery life during a call and do both at the same time. The move was intentional to save costs as well as battery life in the long run.
Sent from my SM-N920T using Tapatalk
I just got my Nexus 5X up and running on verizon. With my Galaxy Nexus I was about to take a phone call while tethering, but can't do that on this phone. Is there a fix for this? It's kind of a bummer because I tether often and take phone calls.
Edit: (12/18/2015) I figured it out. Chatted with VZW tech support to enable HD voice feature, and made sure "enhanced LTE mode" was on in settings. Voice+Data work simultaneously now!
Update: (1/19/2016) I have still intermittently had issues with simultaneously voice+data. I started to wonder if it could depend on who you are calling or what tower you are connected to. I powered down my phone and pulled the sim card for a few seconds, then rebooted and it worked again.
When I got my Nexus 5 back in 2013 I noticed that if I was on LTE and made/received a call the data would switch to H and then switch back to LTE after the call was ended. My Nexus 5X does the same thing. What's the deal? Before I had the Nexus 5 I had a Galaxy SII Skyrocket(the LTE version of the Galaxy SII from AT&T) and that phone would stay on LTE during calls and that was from an early LTE phone (the first AT&T offered). I would expect the same from a current phone in 2015.
jimv1983 said:
When I got my Nexus 5 back in 2013 I noticed that if I was on LTE and made/received a call the data would switch to H and then switch back to LTE after the call was ended. My Nexus 5X does the same thing. What's the deal? Before I had the Nexus 5 I had a Galaxy SII Skyrocket(the LTE version of the Galaxy SII from AT&T) and that phone would stay on LTE during calls and that was from an early LTE phone (the first AT&T offered). I would expect the same from a current phone in 2015.
Click to expand...
Click to collapse
I am using Nexus 5X with T-Mobile and phone stays on LTE during call. There is a settings in: settings>more>cellular networks - Enhanced 4G LTE Mode ON/OFF switch. Do you have that?
Charkatak said:
I am using Nexus 5X with T-Mobile and phone stays on LTE during call. There is a settings in: settings>more>cellular networks - Enhanced 4G LTE Mode ON/OFF switch. Do you have that?
Click to expand...
Click to collapse
Nope. I don't have that option. I'm on AT&T. That's really strange that you Nexus 5X has that and mine doesn't. Kind of strange that yours has software differences. Did you buy your phone directly from Google?
jimv1983 said:
Nope. I don't have that option. I'm on AT&T. That's really strange that you Nexus 5X has that and mine doesn't. Kind of strange that yours has software differences. Did you buy your phone directly from Google?
Click to expand...
Click to collapse
Phone is directly from google and this is the current build #MDB08L. If you have anyone with T-Mobile sim, try it.
Dial *#*#4636#*#*, then tap "phone info", scroll to the bottom and check for "VOLTE PROVISIONED FLAG" - if it is on, then you will see OFF in from of VOLTE...
Charkatak said:
Phone is directly from google and this is the current build #MDB08L. If you have anyone with T-Mobile sim, try it.
Dial *#*#4636#*#*, then tap "phone info", scroll to the bottom and check for "VOLTE PROVISIONED FLAG" - if it is on, then you will see OFF in from of VOLTE...
Click to expand...
Click to collapse
It currently says "TURN OFF VOLTE PROVISIONED FLAG" so I'm guessing it's currently on. However I'm not sure what this has to do with anything. VoLTE means "voice over LTE". I'm not even trying to do voice over LTE. I'm just trying to use LTE for regular data while on a call over regular GSM.
jimv1983 said:
It currently says "TURN OFF VOLTE PROVISIONED FLAG" so I'm guessing it's currently on. However I'm not sure what this has to do with anything. VoLTE means "voice over LTE". I'm not even trying to do voice over LTE. I'm just trying to use LTE for regular data while on a call over regular GSM.
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Click to collapse
That is exactly the case if you want to stay on LTE while on a call, then it is called VoLTE(Voice over LTE). Your setting for that seems to be on...
Things to try, unless Nexus 5X on AT&T is unable to do VoLTE, ask AT&T.
Test with T-Mobile sim
Check APN settings
Check to see if your sim card is old
Charkatak said:
That is exactly the case if you want to stay on LTE while on a call, then it is called VoLTE(Voice over LTE). Your setting for that seems to be on...
Things to try, unless Nexus 5X on AT&T is unable to do VoLTE, ask AT&T.
Test with T-Mobile sim
Check APN settings
Check to see if your sim card is old
Click to expand...
Click to collapse
Everything I've seen says that VoLTE means that the LTE data connection is used to actually make phone calls instead of the traditional cell voice network(GSM/CDMA). I don't care about that. I'm fine with regular phone calls using the regular GSM voice connection. I just want to be able to use the LTE connection for things like browsing while I'm on a regular phone call.
Good to know that it isn't an issue with the phone. I guess it might be an AT&T network issue but that would be strange since it worked with my old Galaxy S II Skyrocket that I bought in 2011. Maybe a compatibility issue between AT&T and this phone? I'll see if I can test with someones T-Mobile SIM. My SIM card is only a month old since I had to get a Nano SIM when switching from my Nexus 5(which took a Micro SIM).
The only way you will be able to use LTE to browse the internet while on a call is if you are placing the call using VoLTE. Before VoLTE (and currently if you don't have it) your phone will always drop to a non LTE connection.
I'm sorry but that's just the way it has been and the way it is. Every device that doesn't use VoLTE will change to a different non LTE signal to place the call.
AFAIK, VoLTE on our device does not seem to be supported on the "gsm" carriers.. Yet.
Maybe try out the Network app? It allows you to specify a network preference and do a bit of fine-tuning.
jimv1983 said:
When I got my Nexus 5 back in 2013 I noticed that if I was on LTE and made/received a call the data would switch to H and then switch back to LTE after the call was ended. My Nexus 5X does the same thing. What's the deal? Before I had the Nexus 5 I had a Galaxy SII Skyrocket(the LTE version of the Galaxy SII from AT&T) and that phone would stay on LTE during calls and that was from an early LTE phone (the first AT&T offered). I would expect the same from a current phone in 2015.
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Click to collapse
I am on Tmobile and sometimes it does the same thing. I have to switch network preference to 2G then make a call hang up switch back to 4G then turn on the VOLTE option.
Sent from my Nexus 5X using Tapatalk
k.s.deviate said:
The only way you will be able to use LTE to browse the internet while on a call is if you are placing the call using VoLTE. Before VoLTE (and currently if you don't have it) your phone will always drop to a non LTE connection.
I'm sorry but that's just the way it has been and the way it is. Every device that doesn't use VoLTE will change to a different non LTE signal to place the call.
AFAIK, VoLTE on our device does not seem to be supported on the "gsm" carriers.. Yet.
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Click to collapse
That might be the case with the Nexus 5 and Nexus 5X but it was absolutely not the case with my old Galaxy SII Skyrocket. Kind of strange that the Nexus 5 and Nexus 5X have this issue. Seems kind of strange to me that the LTE radio would have to be turned off just because you are making a non-VoLTE call.
jimv1983 said:
That might be the case with the Nexus 5 and Nexus 5X but it was absolutely not the case with my old Galaxy SII Skyrocket. Kind of strange that the Nexus 5 and Nexus 5X have this issue. Seems kind of strange to me that the LTE radio would have to be turned off just because you are making a non-VoLTE call.
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Click to collapse
This is the case with all devices that are not using the VoLTE service.
There is no other way, unless of course you are using a VoIP service or hangouts to place your calls.
GreenDroidX said:
I am on Tmobile and sometimes it does the same thing. I have to switch network preference to 2G then make a call hang up switch back to 4G then turn on the VOLTE option.
Sent from my Nexus 5X using Tapatalk
Click to expand...
Click to collapse
Have not had issues with VoLTE on Nexus 5X using T-Mobile.
k.s.deviate said:
This is the case with all devices that are not using the VoLTE service.
There is no other way, unless of course you are using a VoIP service or hangouts to place your calls.
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Click to collapse
I didn't realize VoLTE was a feature of phones in 2011. I'm wondering if maybe AT&T stopped supporting it on its network? Oh well, thanks for the info. I didn't realize a phone had to be able to make calls over LTE to be able to use LTE data while on a call. It's also surprising considering how Verizon does simultaneous voice and data. Once Verizon started supporting LTE phones(several years ago) you could do simultaneous voice and data but it wasn't(at least at that time) using LTE for voice calls. Just for data while a CDMA call was active. I guess it works differently for GSM?
Charkatak said:
Have not had issues with VoLTE on Nexus 5X using T-Mobile.
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Click to collapse
Just to clarify, I'm not trying to make a voice call using LTE(which is what "Voice over LTE" means). Just trying to use LTE data while on a non-LTE voice call.
jimv1983 said:
I didn't realize VoLTE was a feature of phones in 2011. I'm wondering if maybe AT&T stopped supporting it on its network? Oh well, thanks for the info. I didn't realize a phone had to be able to make calls over LTE to be able to use LTE data while on a call. It's also surprising considering how Verizon does simultaneous voice and data. Once Verizon started supporting LTE phones(several years ago) you could do simultaneous voice and data but it wasn't(at least at that time) using LTE for voice calls. Just for data while a CDMA call was active. I guess it works differently for GSM?
Just to clarify, I'm not trying to make a voice call using LTE(which is what "Voice over LTE" means). Just trying to use LTE data while on a non-LTE voice call.
Click to expand...
Click to collapse
In any case in order to stay on LTE and use data, your phone has to support VoLTE, because normal LTE is data only and when you make a call it would drop to 3 or 4G. CDMA and GSM are 2 different type of networks. I was always using GSM providers(T-Mobile in my case) and this is how it works. I don't know how your old phone could let you be on LTE during a call - unless AT&T was using some proprietary service.
Charkatak said:
...because normal LTE is data only...
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Click to collapse
That totally makes sense. I'm fine with that.
Charkatak said:
....and when you make a call it would drop to 3 or 4G.
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Click to collapse
Thats weird.
Charkatak said:
...I don't know how your old phone could let you be on LTE during a call - unless AT&T was using some proprietary service.
Click to expand...
Click to collapse
Yeah, if that's how LTE data works then AT&T must have had something special.
jimv1983 said:
Yeah, if that's how LTE data works then AT&T must have had something special.
Click to expand...
Click to collapse
Early on, phones had a separate 3G radio from their LTE radio. This is a big part of why the first LTE phones had substantial battery drain issues compared to 3G only phones at the same time. One of the nice things about the setup was that you could use 3G for voice and LTE for data simultaneously. With the move to integrated modems, which significantly improved battery life and speed, that feature was lost. Until AT&T implements a standard for VOLTE like T-Mobile has you're going to have to deal with the lower speeds while on a call.
raptir said:
Early on, phones had a separate 3G radio from their LTE radio. This is a big part of why the first LTE phones had substantial battery drain issues compared to 3G only phones at the same time. One of the nice things about the setup was that you could use 3G for voice and LTE for data simultaneously. With the move to integrated modems, which significantly improved battery life and speed, that feature was lost. Until AT&T implements a standard for VOLTE like T-Mobile has you're going to have to deal with the lower speeds while on a call.
Click to expand...
Click to collapse
OK that explains it. The Galaxy S2 Skyrocket was the first AT&T LTE phone so it probably had separate radios. I'm also kind of concerned with what VoLTE will do to battery life. I remember that one of the ways phone matters were reducing battery drain was to keep the radio asleep unless it was asleep. With VoLTE the LTE radio would have to be active all the time. Has the energy efficiency of newer LTE radios made that a non-issue? How is battery life on T-Mobile vs AT&T using the same phone under similar conditions?
Is Mi Mix 2 works on US T-Mobile for VOLTE and WiFi Calling?
Thanks in advance.
It should
stu5797 said:
It should
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I just want to make sure since it comes from overseas and not sold officially in states.
Yes, existing services will work, however the SIM card for the account with the services has to be activated on a network approved/issued phone. If not, you will need to call support. If you've used volte before bringing the phone onto the network, it will work from their end though you may have to change the settings on the device. If you are trying to activate a new service with the phone, you will need to call T-Mobile.
t-mizzle said:
Yes, existing services will work, however the SIM card for the account with the services has to be activated on a network approved/issued phone. If not, you will need to call support. If you've used volte before bringing the phone onto the network, it will work from their end though you may have to change the settings on the device. If you are trying to activate a new service with the phone, you will need to call T-Mobile.
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Click to collapse
Thanks. How about wifi calling?
Same as volte or other features. If a network service/feature has been active/used on the network before the new phone was brought to the network, it's all good from the carrier end.
t-mizzle said:
Same as volte or other features. If a network service/feature has been active/used on the network before the new phone was brought to the network, it's all good from the carrier end.
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Click to collapse
I don't think thats a correct statement. I have VOLTE and wifi calling on my current phone. But when I got Xperia XZ premium mone of those features worked.
daviddem said:
I don't think thats a correct statement. I have VOLTE and wifi calling on my current phone. But when I got Xperia XZ premium mone of those features worked.
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Click to collapse
You misunderstood. If you put a SIM into a network issued or supported phone, typically the services that are already active will work right away. However if you bring a phone to the network that is not sold by the carrier, chances are you will have to call them to get the services working.
Some carriers are setup in a way that inserting a new sim into a phone unknown to the network won't work, some or all services may be disabled but if you put the new sim into a recognized device first, the sim and it's services will be active and you can just transfer it to the unrecognized phone. Of course, that may not be enough, modifying APN settings on the phone for example may be needed to get it running
I'm going to cut my monthly bill in half by switching to project fi and I'm sharing my plan here though it will work and/or make sense for very few users out there.
It only makes sense to do this if you are already on T-Mobile's network and you pull less than 2GB from the LTE network. This is due to the low base cost but high bandwidth prices through project fi. If you are a heavy data user and you don't pull the bandwidth from wifi, project fi plan would cost more than the T-Mobile you're on.
Next up, you need one of these 6 devices:
Pixel XL Model G-2PW2100 (North American version)
Pixel Model G-2PW4100 (North American version)
Android One Moto X4 (All versions)
Nexus 5X Model LGH790 (North American version)
Nexus 6P Model H1511 (North American version)
Nexus 6 Model XT1103 (North American version)
While you can use most phones on project fi, (all phones that already work on T-Mobile will do) only these 6 phones can activate a project fi sim. If you don't already have one, you don't need to buy them, you can just borrow one from a friend however they can be used to activate a fi sim only once, after the activation that phone won't be able to activate another. Or if you find a damaged phone cheap, it only needs to be able to connect to the internet, read a sim and it's touch screen is still working, you can do that. Nexus and pixel phones with shattered screens sell as low as $50, you just need it activate it the sim. If you don't pull lots of data, you recover the cost in 2 billing cycles.
Project fi works by having a physical T-Mobile SIM, virtual Sprint SIM (it supports up to 10 virtual SIM cards) and it connects to an array of wifi networks in urban areas throughout the US. A fully compatible project fi phone connects to all of them, other phones aren't compatible with the virtual SIMs so they are limited to T-Mobile's network, so if you are a T-Mobile user, nothing changes except the reduction in monthly bill (provided you don't pull lots of data through T-Mobile.
Now this is where the mix 2 comes in. It's compatible with all but the T-Mobile band 71 but I wouldn't get excited about that anytime soon, by the time T-Mobile fully deploys it's 600 MHz band, today's flagships will have reached end of life anyway, it's something to consider once mix 3 or mix 4 are out. I suspect that the Mix 2 is capable of utilizing both T-Mobile's and Sprint network due it's array of compatible bands but I won't know for sure until next week. Even if it's not, using the mix 2 through T-Mobile's network only at a reduced cost is still a good deal.
t-mizzle said:
I'm going to cut my monthly bill in half by switching to project fi and I'm sharing my plan here though it will work and/or make sense for very few users out there.
.
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Click to collapse
You would be better off switching to http://www.mintsim.com
The 2Gb, and unless you are extremely miserly on Data, the 5Gb plan will be cheaper than Project Fi. Mint is on T-mobile, and owned and operated by UltraMobile. You do have to buy several months at once, so that is a downside, but if you can afford the outlay of cash, it is a very inexpensive service. I personally just switched from Project Fi, and have been happy with the service.
That is a good alternative too. Ting is also an option for those wanting to reduce their bills. I live in an urban area and project fi is the only viable alternative for me, all the local MVNO's get blatantly deprioritized.
daviddem said:
Thanks. How about wifi calling?
Click to expand...
Click to collapse
T-Mobile's WiFi Calling will not be baked into the Mi Mix 2, there for you won't have the ability to use it. T-Mobile requires a WiFi certification through them that the phone manufacture must pay for and provide units for testings in order to receive their certification. Although the Mi Mix 2 has every band supported that T-Mobile uses outside of the new 600MHx band 71 and extended band 4 on band 66, it will work fine for calling and texting but no WiFi Calling.
Can anyone confirm volte works on T-Mobile? Thanks!
Sent from my Redmi Note 4 using Tapatalk
Ulver said:
Can anyone confirm volte works on T-Mobile? Thanks!
Sent from my Redmi Note 4 using Tapatalk
Click to expand...
Click to collapse
VoLTE works on MintSIM, which is an MVNO on T-Mobile.
Has anyone used it with actual T-Mobile and can confirm it's working? Or is it guaranteed to work with actual T-Mobile if it works on a T-Mobile MVNO? Thanks guys!
I am in Australia on Telstra, on my Redmi 3 it used to drop from LTE to 3G when making a call.
Now is says 4G+ even during a call, on my MI Mix 2
When I turn on Volte is says HD next to 4G+, when I turn off Volte the HD disapears, I guess HD stands for High Definition?
FMXP said:
Has anyone used it with actual T-Mobile and can confirm it's working? Or is it guaranteed to work with actual T-Mobile if it works on a T-Mobile MVNO? Thanks guys!
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Click to collapse
Yes,I got the MIX2 two days ago,have used it w/LTE Bands 4 & 12.
VoLTE is built-in/switchable on/off,AFAICT,no WI-FI Calling.
From my limited use,it all works well (calls/text),connects to WI-FI very quickly,stays connected.
Data signal seems to work well also,turned off WI-FI to test weak T-Mobile signal when @ home,found/stayed connected to Band 12 w/no problem.
There is no WiFi Calling option in this phone (I just got one) ?
toiday said:
There is no WiFi Calling option in this phone (I just got one) ?
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Click to collapse
WiFi Calling for T-Mo ile is enabled on a certified device by T-Mobile when a T-Mobile SIM is detected. The Mi MIX 2 has not submitted a request for testing and has not paid for the certification process to have T-Mobile WiFi Calling enabled. Xiaomi is not marketing the device towards the U.S. market so there will not be any T-Mobile WiFi Calling on the Mi MIX 2.
toiday said:
There is no WiFi Calling option in this phone (I just got one) ?
Click to expand...
Click to collapse
Wifi calling works if you use Google Voice.
Hello everyone.
I'm new here and this is my newest phone purchase after weeks and weeks of research I decided to purchase this phone. However I'm having one big problem. I cannot receive phone calls using the phone. However I can send text messages which is strange and when I try to talk to someone it switches to 2G for no real reason too.
It's fully updated and completely stock in fact just purchased three days ago. I'm wondering what I could do so I can get this thing working again. I have 30 days to return this thing, and I rather not because its a rather good phone and I like it a lot but if I can't get it to receive phone calls then I have to return it.
please help anyone.
Dallas Texas said:
Hello everyone.
I'm new here and this is my newest phone purchase after weeks and weeks of research I decided to purchase this phone. However I'm having one big problem. I cannot receive phone calls using the phone. However I can send text messages which is strange and when I try to talk to someone it switches to 2G for no real reason too.
It's fully updated and completely stock in fact just purchased three days ago. I'm wondering what I could do so I can get this thing working again. I have 30 days to return this thing, and I rather not because its a rather good phone and I like it a lot but if I can't get it to receive phone calls then I have to return it.
please help anyone.
Click to expand...
Click to collapse
Try installing the t-mobile visual voicemail app, there maybe settings in there you can adjust, only if your U.S though.
boe323 said:
Try installing the t-mobile visual voicemail app, there maybe settings in there you can adjust, only if your U.S though.
Click to expand...
Click to collapse
I had the same problem check the apn settings my was the stock tmo setting with the phone and a . Was in the wrong spot
boe323 said:
Try installing the t-mobile visual voicemail app, there maybe settings in there you can adjust, only if your U.S though.
Click to expand...
Click to collapse
rob420p said:
I had the same problem check the apn settings my was the stock tmo setting with the phone and a . Was in the wrong spot
Click to expand...
Click to collapse
Alright I'll try and install the T-mobile visual voicemail app and see what is good
APN settings yes? I have tried that and tried inputting a manual one and even the ones on there which has three types of T-mobile settings
I'm not an expert on this but I have been looking for info on this for a while before I buy an A2 Lite to use on T-Mobile and I believe this post by a T-Mobile MVNO customer service rep may answer your question
The TLDR is that T-Mobile strictly uses band 12 for all VoLTE calls and if the phone doesn't support band 12/VoLTE T-Mobile forces it to use 2G for calls and texts. In some areas where the spectrum has been refarmed and there are a lot of 2G users your incoming call will time out before the tower finishes searching for you on VoLTE and ultimately tries to connect you to 2G, resulting in your phone not actually ringing.
This would also explain why there are no issues with texts, since they don't time out like an incoming call. Apparently there is no solution to this if you live in certain areas and use T-Mobile, and it will continue to get worse as spectrum is refarmed.
Sorry for the delay -- I'm technically off today. I saw you question and just had to pop in and answer, because I have a complete answer for you. Your issue is band compatibility, specifically the lack of Band 12. Let me explain:
For years and years, T-Mobile sent all their calls over the legacy 2G network on 1900MHz. Every call and text message went over this frequency, and all T-Mobile phones still support it for backwards compatibility.
Then, T-Mobile launched Voice over LTE, or VoLTE. But, they made the stipulation that VoLTE would only ever work on LTE Band 12. That means that any phone that didn't specifically have Band 12 LTE would still have to use the 2G 1900MHz frequency to send all calls and text messages. Any phone that did support Band 12 could use VoLTE and would send all their calls and texts through that VoLTE Band 12 connection.
That's not really a problem for most people, as T-Mobile's 2G network is still live in all their markets. These phones will connect to the LTE network for all data, but all their calls and texts go over that 2G connection.
Enter the problem: Spectrum crunch. Spectrum in the US is a limited resource. That's why the auctions always for it always go for millions of dollars for tiny portions. T-Mobile (and by extension, all its MVNOs, as we have no power over how they build their network) wants to make LTE the new standard, and push into 5G. In order to do that, they need to launch LTE in more places, and feed more devices than ever. They only have so much spectrum, so they reallocate what they already have to the new technology.
This is already happening with 3G. 2G is, again, just being kept around for backwards compatibility. They take the sectors that broadcast 3G (and 2G) and make them smaller and smaller, so the rest of the room can be used for LTE to service more devices faster. It makes business sense.
The process is called "re-farming" spectrum, and a quick Google search quickly becomes a rabbit hole as you find other people in your circumstance. They put the disused services on tiny little slivers of spectrum, some as small as 5MHz, which without getting too technical, is tiny.
If you happen to be unlucky enough live in an area where they're re-farming 2G spectrum to LTE, and your phone doesn't support VoLTE on Band 12, you're effectively fighting all the other T-Mobile (really any carrier, but for arguments' sake) customers whose devices also need to connect to that 2G network
Add enough people, and you get the problem you're having. A call comes into the network, and the towers go to work trying to find you. First, they try VoLTE, and don't find you there. Then they try the old 2G network, but there's like 200 other people in your area that are connected to that one tower, so it has to fight through them all to find your SIM card number and connect the call and-- right before it connects, the call times out of rings and your caller is sent to Voicemail.
You never get a missed call alert, your caller isn't alerted that your phone didn't ring, and because your phone didn't get a confirmation, you probably won't get a voicemail notification.
This doesn't affect the phone's ability to connect to the 3G network or 4G LTE Bands 2 and 4, which lots of phones support. But calls and texts don't travel over those networks. You'll still have an active, working data connection if this is what's happening to you, which is why it's hard to diagnose not just for Ting reps, but our customers and other MVNOs, as well as T-Mobile itself.
This problem isn't going to go away, and it's only going to get worse as re-farming 2G goes nationwide. It's not Ting-specific. Any T-Mobile device will have this problem if there are enough 2G-talk-and-text users in your area.
The phone in question, the Blu Vivo 5, supports Band 2 and Band 4 for LTE, but doesn't support Band 12, and thus doesn't support VoLTE. This is exactly what's happening to you.
This is exactly how it happened to my S/O. She had a Motorola Droid Mini on Ting GSM that worked great for years, on two distinct T-Mobile-powered networks. Then, T-Mobile re-farmed enough 2G in our area that she started missing calls, texts wouldn't arrive and she wouldn't get voicemails. The key identifier that this was her problem was that placing a call would take something like 10-15 seconds to connect. Typically, this should be instant.
There was nothing wrong with the phone at all -- it was working as designed. The second I got her into a Band 12 VoLTE phone, the problems disappeared completely. Nothing else changed.
The only solution is a new (or new-to-you) phone that supports Band 12 and VoLTE. No number of hard resets, network resets or new SIM cards will fix this problem. You'll have this problem on any network that uses T-Mobile as their backbone, as long as the phone you're using doesn't support Band 12 LTE and VoLTE.
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I don't have a high enough post count to post a link but it was posted on r/Ting if you search that subreddit for the thread titled "Over 4 years and now this" you should find it. The info was written by u/literallyunlimited.
D412 said:
I'm not an expert on this but I have been looking for info on this for a while before I buy an A2 Lite to use on T-Mobile and I believe this post by a T-Mobile MVNO customer service rep may answer your question
The TLDR is that T-Mobile strictly uses band 12 for all VoLTE calls and if the phone doesn't support band 12/VoLTE T-Mobile forces it to use 2G for calls and texts. In some areas where the spectrum has been refarmed and there are a lot of 2G users your incoming call will time out before the tower finishes searching for you on VoLTE and ultimately tries to connect you to 2G, resulting in your phone not actually ringing.
This would also explain why there are no issues with texts, since they don't time out like an incoming call. Apparently there is no solution to this if you live in certain areas and use T-Mobile, and it will continue to get worse as spectrum is refarmed.
I don't have a high enough post count to post a link but it was posted on r/Ting if you search that subreddit for the thread titled "Over 4 years and now this" you should find it. The info was written by u/literallyunlimited.
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Click to collapse
Thanks fam, I'll return it and get another phone I appreciate the information brother.