[Q] Why can't we use data during a call? - Epic 4G Q&A, Help & Troubleshooting

So I was downloading AA V7 from my phone. Since I was at work. I started about 6 20 pm. On a 100% battery. Around 8 20 pm with a 28 % battey I was at 96% when I got a phone call and canceled my download. Why o why. Damn u sprint. Does any one know if 4g will stay connected while your in a call?
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notsosmrtgeek said:
So I was downloading AA V7 from my phone. Since I was at work. I started about 6 20 pm. On a 100% battery. Around 8 20 pm with a 28 % battey I was at 96% when I got a phone call and canceled my download. Why o why. Damn u sprint. Does any one know if 4g will stay connected while your in a call?
Sent from my fake Nexus S 4G using XDA Premium App
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Cdma will not allow data and calling its a network thing...a no no but 4g works I tested it before and it works no problem
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Thanks. I don't get 4g at my work but in my town there is. but I will just dl it later. Damn sprint
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I feel your pain
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You can use wifi while on a call

rulyskull said:
Cdma will not allow data and calling its a network thing...a no no but 4g works I tested it before and it works no problem
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I know, why doesn't Sprint advertise that fact? I've found myself surprised when I get a call while doing interweb things and everything continues as is. By the way, I think HBO GO thinks 4g=wifi.

And that's why GSM is so much better...
SIM cards > ESN
Data and voice simultaneously? Yes please.
IIRC it's frequencies penetrate buildings better as well.

I normally have wifi on at home because I am in between. Areas at my apt so I knew about the wifi but there is always a negative fml. But at home time for some v7. I have about 30 pages to catch up on heheheh.
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I was able to take a call and use data..I have Sprint. I was in a 4G area. Voice and data shouldnt be a problem at the same time. I had an Adobe connect going. Never lost connection and I was using wired tether..I am rooted. But no issues
Sent from my Swagurious Evo...

I have googled something while on a phone call without 4G or wifi. Heavy traffic stops or crawls so much you may think it doesn't work or timeouts.

Kal*El said:
I was able to take a call and use data..I have Sprint. I was in a 4G area. Voice and data shouldnt be a problem at the same time. I had an Adobe connect going. Never lost connection and I was using wired tether..I am rooted. But no issues
Sent from my Swagurious Evo...
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Okay everyone, let me teach you a little something. AT&T and T-Mobile both allow you to use data while on a call, why is that? It is actually because, back in the days before data, AT&T used ONLY GSM radio frequencies. These were perfect for phone calls and texting, but once data connections were required, their network couldn't handle it.
However, Sprint and Verizon were fine, because they used CDMA, a network that allows them to handle voice and data on the same frequency.
GSM providers were sad, so to fix it, they added a CDMA frequency to their arsenal. This means, they use two frequencies at the same time a GSM frequency to handle calls and text, and a CDMA frequency to handle data. So while you are on a call, the CDMA frequency is still free, hence the talk and web simultaneously.
Sprint and Verizon, however use CDMA for everything, so when you make a phone call, the network is being used. So data can't also get through. But 4G is yet another frequency so that can be used at the same time as a phone call.
Does this make sense?
Also, while GSM can penetrate buildings better, it is also much less reliable. It's large wavelengths allow it to travel through walls better, but also cause the dredded dropped calls that AT&T experience so much. I'll take CDMA over GSM everyday of the week. Besides, other then the rare occasion in which we are downloading (though we should never download something that big over 3G) we don't NEED talk and data at the same time.

The Root said:
I know, why doesn't Sprint advertise that fact? I've found myself surprised when I get a call while doing interweb things and everything continues as is. By the way, I think HBO GO thinks 4g=wifi.
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Why would sprint advertise a flaw. That's why att advertises that they can talk and surf with the iphone duh

i know it doesnt work and it takes forever. but i am a flashaholic and damn it sucks when i go to work and the rom i have been waiting for gets released

There are a bunch of errors here.
CDMA can do Voice and data at the same time. Verison did not want that, and as the largest CDMA company, every one stopped developing new and better protocols and by default standardized on the Verizon way.
But not all Dev stopped. Outside North America there are several CDMA carriers that use EVDV? and other protocols that allow simultaneous Voice data connections on their frequencies. I believe Russia does on their 450MHz system. In fact these protocols are built in to any newer phone and all new tower equipment, but has not been implemented. Some have suggested when Sprint finishes their soft radio upgrade, they may offer it on a new phone.
Censura_Umbra had much good info, but it is not NECESSARY, from a tech point of view to have two different frequencies to do voice and data. It has been suggested that ATT wanted TWO separate systems for voice and data, as that is how big telcos are. I find this accurate.
One should also note that there are SIM CDMA phones. SIM is a separate tech entirely. North American Vendors do not use SIM cards to protect there handset hardware revenue streams. It is also why they lobbied so hard to try to get ESN modification illegal.
Final point. There are plenty who complain about frequency penetration.
1) While lower frequencies do penetrate things better, and thus may have more cancer risk
2) They also take more power to create. Thus reducing phone life.
3) Frequency attenuation do to penetration is predictable. With modern protocols, data rates can be unaffected. These things are not being implemented do to the FAT revenue streamed on handsets.

I'm not sure what everyone is talking about, I use 3G a lot while on calls.

Censura_Umbra said:
Okay everyone, let me teach you a little something. AT&T and T-Mobile both allow you to use data while on a call, why is that? It is actually because, back in the days before data, AT&T used ONLY GSM radio frequencies. These were perfect for phone calls and texting, but once data connections were required, their network couldn't handle it.
However, Sprint and Verizon were fine, because they used CDMA, a network that allows them to handle voice and data on the same frequency.
GSM providers were sad, so to fix it, they added a CDMA frequency to their arsenal. This means, they use two frequencies at the same time a GSM frequency to handle calls and text, and a CDMA frequency to handle data. So while you are on a call, the CDMA frequency is still free, hence the talk and web simultaneously.
Sprint and Verizon, however use CDMA for everything, so when you make a phone call, the network is being used. So data can't also get through. But 4G is yet another frequency so that can be used at the same time as a phone call.
Does this make sense?
Also, while GSM can penetrate buildings better, it is also much less reliable. It's large wavelengths allow it to travel through walls better, but also cause the dredded dropped calls that AT&T experience so much. I'll take CDMA over GSM everyday of the week. Besides, other then the rare occasion in which we are downloading (though we should never download something that big over 3G) we don't NEED talk and data at the same time.
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I'm very well versed in gsm cdma and tdma networks....voice and data at the same time will depend on a personal preference. I enjoyed using it bc I do meetings on the go. Sprint's network will allow that.
Ppl are getting confused with 3G...bc they assume since ATT has this that all carriers should have it..4G allows this.....
Sent from my Swagurious Evo...

Related

Evdo rev. b shot down by sprint

Official Sprint Answer:
Sprint is committed to delivering the highest quality network experience. Our Network Vision plan will improve your network experience, but it does not include any EVDO Rev B launch. Sprint has evaluated EVDO Rev B and chosen to go directly to 4G connections. Since we are not launching EVDO Rev B, none of our handsets supports EVDO Rev B.
It looks like maybe no Rev. B after all. Hopefully they'll push 4G LTE and keep going.
FINALLY! Thank goodness. Let's stick a fork in this horse.
BTW, where is your source? (I know others will ask)
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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corybucher said:
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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What good is speed if hardly anybody can get it? Give me more coverage!
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corybucher said:
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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not surprising that a Sprint rep would say that..unfortunately, the truth seems to be just the opposite in the real world, based on everything I have read about Verizons LTE, and my friends who have it say the same thing..makes Sprints non sense look lame compared to it..
and just like i said in the other thread.....you people were freaking out over a baseless rumor
now how many of these idiots actually turned there phones back in
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corybucher said:
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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getting your info from a sprint rep is like getting info from sarah palin about the economy....
Neither the LTE that's being rolled out by Verizon and ATT or sprints current Wimax meet the international standard that 4g is supposed to be.
But the LTE technologies being rolled out are a step in the right direction.
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spencer88 said:
What good is speed if hardly anybody can get it? Give me more coverage!
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Word! I'll take any form of 4G in San Diego, even if I have to follow a donkey around with a WiMax tower, built by a few guys behind a 7-11 with straws and Big Gulp cups, strapped to its back.
corybucher said:
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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That is simply idiotic. It makes no sense.
Sprint's WiMax implementation sucks. Putting LTE on those same frequencies would also suck. Maybe worse.
It's not the protocol it's the spectrum. Clearwire/Sprint's WiMax is on a handful of razor-thin bands on high frequencies. It's not surprising that it sucks so much and the word "WiMax" has nothing to do with it.
imtjnotu said:
and just like i said in the other thread.....you people were freaking out over a baseless rumor
now how many of these idiots actually turned there phones back in
Haha right. All that bull**** about rev b and the **** ain't even happening. U said it correctly. The people who returned their phones based on that are IDIOTS
sent from my DAMN phone!
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Wimax doesn't HAVE to be any worse than LTE or suck -- Clear just did a crap job of deploying the most minimal subset of the standard possible. WiMax CAN do soft hand-offs... Clear just didn't bother buying the software license to enable it to work, and instead chose to deploy them the cheapest way possible, and configured them to act like wifi access points that just happen to have ~1km footprints).
There's nothing magic about Verizon's LTE -- they have more backhaul, and allocated more bandwidth to it than Clear did. Sprint LTE can suck every bit as badly as Sprint/Clear Wimax does, and it won't be any more compatible with AT&T or Verizon's LTE than Sprint phones are with their 3G service.
LTE's standard-ness is wildly over-hyped, and almost completely meaningless in the US. In Europe and Asia, it might matter and mean something. Unfortunately, America's wireless phone market is as messed up as Japan's, and unlikely to ever change. If Sprint bought and merged with T-Mobile, and deployed a nationwide unified network with CDMA2000 voice & 1xRTT, legacy GSM & GPRS/EDGE, EVDO (rev.A, B, and Advanced), WiMax, AND LTE... AT&T and Verizon would still manage to find ways to be incompatible with it and each other, because they don't WANT their networks to be commodity-like wireless pipes to the internet where consumers can switch service providers at will and without repercussions.
IMHO, the best thing Sprint could possibly DO right now is repurpose the Wimax for backhaul, and use it to fully saturate their EVDO spectrum (and, once the furor over rev.B dies down, quietly enable and advertise it with some stupid name like "Ultim8 Vision" since their new tower hardware is almost certainly capable of it). Deploying two separate loosely stapled-together data networks was just about the worst idea in mobile phone history, especially when you consider that the move was 100% marketing and had nothing to do with real-world performance.
In most places, unless you're having a picnic lunch outdoors next to the tower, you'd get better sustained performance from Rev.A with enough backhaul bandwidth to fully saturate it, let alone Rev.B -- and unlike Sprint's disastrous experiment with 4G, your phone wouldn't spend half its time madly thrashing back and forth between 3G and 4G trying to make up its mind which one it wants to use (leaving you without network access for 10-30 seconds or more each time). For proof, just look at T-Mobile in places like Chicago. Same un-sexy UMTS as before, but in places where they've put it to full use and squeezed every bit of performance out of it they can, it blows Sprint's 4G away in real-world usability.
Concise and all encompassing. I couldn't have said it better my self. Meaning I actually do not have it in my own capacity to say it better, or even as well, myself.
Your presence in our forum is an asset. You truly know what's up.
That said, I couldn't agree more...lol
I talked to a sprint from corp in lisa angeles he told me lte and wimax have almost the same speeds and lte can go further
corybucher said:
Just throwing this out there bit talked to a sprint rep at my local corporate store and guy said that lte is not faster than wimax infact wimax is true 4g and he told me that lte is like turning your volume to 11 and is just a little better than 3g. Said lte will most likely cover more areas but wimax is still a lot faster.
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Verizon's current LTE and Sprint's WIMAX are not true 4G. LTE Advanced and WIMAX 2 (802.16m) are the true 4G standards.
F that true 4g stuff. They are the 4th major data network type for their respectable providers
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bitbang3r said:
Wimax doesn't HAVE to be any worse than LTE or suck -- Clear just did a crap job of deploying the most minimal subset of the standard possible. WiMax CAN do soft hand-offs... Clear just didn't bother buying the software license to enable it to work, and instead chose to deploy them the cheapest way possible, and configured them to act like wifi access points that just happen to have ~1km footprints).
There's nothing magic about Verizon's LTE -- they have more backhaul, and allocated more bandwidth to it than Clear did. Sprint LTE can suck every bit as badly as Sprint/Clear Wimax does, and it won't be any more compatible with AT&T or Verizon's LTE than Sprint phones are with their 3G service.
LTE's standard-ness is wildly over-hyped, and almost completely meaningless in the US. In Europe and Asia, it might matter and mean something. Unfortunately, America's wireless phone market is as messed up as Japan's, and unlikely to ever change. If Sprint bought and merged with T-Mobile, and deployed a nationwide unified network with CDMA2000 voice & 1xRTT, legacy GSM & GPRS/EDGE, EVDO (rev.A, B, and Advanced), WiMax, AND LTE... AT&T and Verizon would still manage to find ways to be incompatible with it and each other, because they don't WANT their networks to be commodity-like wireless pipes to the internet where consumers can switch service providers at will and without repercussions.
IMHO, the best thing Sprint could possibly DO right now is repurpose the Wimax for backhaul, and use it to fully saturate their EVDO spectrum (and, once the furor over rev.B dies down, quietly enable and advertise it with some stupid name like "Ultim8 Vision" since their new tower hardware is almost certainly capable of it). Deploying two separate loosely stapled-together data networks was just about the worst idea in mobile phone history, especially when you consider that the move was 100% marketing and had nothing to do with real-world performance.
In most places, unless you're having a picnic lunch outdoors next to the tower, you'd get better sustained performance from Rev.A with enough backhaul bandwidth to fully saturate it, let alone Rev.B -- and unlike Sprint's disastrous experiment with 4G, your phone wouldn't spend half its time madly thrashing back and forth between 3G and 4G trying to make up its mind which one it wants to use (leaving you without network access for 10-30 seconds or more each time). For proof, just look at T-Mobile in places like Chicago. Same un-sexy UMTS as before, but in places where they've put it to full use and squeezed every bit of performance out of it they can, it blows Sprint's 4G away in real-world usability.
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Clears coverage could be the exact same as Verizon's LTE and it would still be garbage due to the frequency its on.
---------- Post added at 05:23 AM ---------- Previous post was at 05:22 AM ----------
Tuffgong4 said:
Verizon's current LTE and Sprint's WIMAX are not true 4G. LTE Advanced and WIMAX 2 (802.16m) are the true 4G standards.
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Do you think consumers give a damn about this? Honestly...
bitbang3r said:
Wimax doesn't HAVE to be any worse than LTE or suck -- Clear just did a crap job of deploying the most minimal subset of the standard possible. WiMax CAN do soft hand-offs... Clear just didn't bother buying the software license to enable it to work, and instead chose to deploy them the cheapest way possible, and configured them to act like wifi access points that just happen to have ~1km footprints).
There's nothing magic about Verizon's LTE -- they have more backhaul, and allocated more bandwidth to it than Clear did. Sprint LTE can suck every bit as badly as Sprint/Clear Wimax does, and it won't be any more compatible with AT&T or Verizon's LTE than Sprint phones are with their 3G service.
LTE's standard-ness is wildly over-hyped, and almost completely meaningless in the US. In Europe and Asia, it might matter and mean something. Unfortunately, America's wireless phone market is as messed up as Japan's, and unlikely to ever change. If Sprint bought and merged with T-Mobile, and deployed a nationwide unified network with CDMA2000 voice & 1xRTT, legacy GSM & GPRS/EDGE, EVDO (rev.A, B, and Advanced), WiMax, AND LTE... AT&T and Verizon would still manage to find ways to be incompatible with it and each other, because they don't WANT their networks to be commodity-like wireless pipes to the internet where consumers can switch service providers at will and without repercussions.
IMHO, the best thing Sprint could possibly DO right now is repurpose the Wimax for backhaul, and use it to fully saturate their EVDO spectrum (and, once the furor over rev.B dies down, quietly enable and advertise it with some stupid name like "Ultim8 Vision" since their new tower hardware is almost certainly capable of it). Deploying two separate loosely stapled-together data networks was just about the worst idea in mobile phone history, especially when you consider that the move was 100% marketing and had nothing to do with real-world performance.
In most places, unless you're having a picnic lunch outdoors next to the tower, you'd get better sustained performance from Rev.A with enough backhaul bandwidth to fully saturate it, let alone Rev.B -- and unlike Sprint's disastrous experiment with 4G, your phone wouldn't spend half its time madly thrashing back and forth between 3G and 4G trying to make up its mind which one it wants to use (leaving you without network access for 10-30 seconds or more each time). For proof, just look at T-Mobile in places like Chicago. Same un-sexy UMTS as before, but in places where they've put it to full use and squeezed every bit of performance out of it they can, it blows Sprint's 4G away in real-world usability.
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Very nicely put even though I am quite sad about no rev b which I think would be a good idea to help with speed and capacity they are applying 1x advanced which will help capacity issues and enable simultaneous voice and data which will be nice. But the combined tower spectrums once phones come out with chips that will take advantage of it it should increase data speeds and coverage greatly the problem now is the wait they need to hurry up and get every one off Nextel, and start the conversion.
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I would be more than happy if they just fixed Rev A to work at a reasonable speed like 1.5-2M (which is what Verizon is providing in my area).
As to "true" 4G, I don't think anybody really cares, they just want something that works, not some experiment where you turn it on to run speed tests and brag to your friends, then turn it off because your battery will die or because you don't get signals indoors.
Gotta love how in all the discussion about frequency strength, frequency distance, speed, technology etc; people tend to forget the meaning of G in 2g, 3g and 4g is GENERATION.
To arbitrarily define how fast something should be to be considered a new "generation" should be insulting and stupid to pretty much everyone. It'd be like saying Generation X were just Baby Boomers 2g because they weren't good enough to be their own generation.
Put a sock in it. 4th generation of mobile networks = 4g. Nuff said.
AbsolutZeroGI said:
Gotta love how in all the discussion about frequency strength, frequency distance, speed, technology etc; people tend to forget the meaning of G in 2g, 3g and 4g is GENERATION.
To arbitrarily define how fast something should be to be considered a new "generation" should be insulting and stupid to pretty much everyone. It'd be like saying Generation X were just Baby Boomers 2g because they weren't good enough to be their own generation.
Put a sock in it. 4th generation of mobile networks = 4g. Nuff said.
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"Quoted for the truth"
LOVE the "Baby Boomers 2G analogy"!
I guess all the BS marketing hype by the phone carriers has actually worked on the mindless lemmings that walk among us..

Can someone explain why wifi calling is so popular!

I don't understand why wifi calling is so important to people. Especially if it means you can have multi window without it. Anyways doesn't everyone have unlimited minutes these days?
trevor7428 said:
I don't understand why wifi calling is so important to people. Especially if it means you can have multi window without it. Anyways doesn't everyone have unlimited minutes these days?
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I agree!
★ Sent by an Idiot with a phablet ★
For me its the fact that reception is horrible in my apartment, if you go outside its fine. I dont like going outside just to make a call every time so the wifi calling gives me reception inside.
Reception is the issue
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I guessing it's free and reception issues. I'm not a big fan though
I live out in the boonies absolutely no signal within a few miles from the house. Wish I didn't have to have it esp since I love that All Star so much.
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I live in a townhouse within viewing distance from a cell tower and yet in my house I can get maybe 1 signal at one of the house (sometimes none at all). If I wanted to make a call I had to go to the garage. So wifi calling is important to me.
I'd be willing to sacrifice wifi calling for a multi-window rom if (and only if) I found a reliable option for wifi calling that's free, because t-mobile's wifi calling works very well for me.
It ABSOLUTELY is reception for many people. T-Mobile's fantastic when you get a good signal, but step inside any building made of concrete, or a brick house, or a house with other signal attenuating characteristics and you're screwed, dead zone. It's why I dumped TMo a couple of years ago, though I came back to try their Note II and newer HSPA+42 data service.
My office building is still a data dead zone, but voice calls come in if I'm near a window. My house, though, TMo's gone from a dead zone two years ago to a full-bars signal.
I went to south dakota a few weeks ago to visit my brother and his family.. t mobile, Verizon, Sprint and att reception there is abysmal.. if it wasn't for Wi-Fi calling i would've been screwed.. it's so bad there i asked my brother, "how do u deal with this reception?" Seriously i had zero bars from Irene sd to sioux falls sd if it wasn't for Wi-Fi i wasn't gonna be talking to anyone...
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trevor7428 said:
I don't understand why wifi calling is so important to people. Especially if it means you can have multi window without it. Anyways doesn't everyone have unlimited minutes these days?
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minutes aren't free. still eats into your monthly rate plan for minutes, but providers better reception. my house has horrible to no signal so I use wi-fi calling not necessarily so people can call me, but so my phone doesn't eat up battery looking for network all the time.
Jinra321 said:
minutes aren't free. still eats into your monthly rate plan for minutes, but providers better reception. my house has horrible to no signal so I use wi-fi calling not necessarily so people can call me, but so my phone doesn't eat up battery looking for network all the time.
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If you are on an eligible plan you can add the free wifi calling as a additional service. My grandfathered preferred plan won't allow the free wifi calling service... It deducts minutes from my allotment. There are parts on my house that get poor reception so I use it for that purpose.
Hastily spouted for your befuddlement
As most have mentioned, reception is the main reason. I appreciate wifi for vocal quality. Typically, wifi calling is higher quality, though can be plagued with volume issues on some phones
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samklee said:
As most have mentioned, reception is the main reason. I appreciate wifi for vocal quality. Typically, wifi calling is higher quality, though can be plagued with volume issues on some phones
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You guys do know that if you put wifi calling on you plan it doesn't use your minutes
deeznutz1977 said:
You guys do know that if you put wifi calling on you plan it doesn't use your minutes
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If your plan allows it...
Hastily spouted for your befuddlement
Coug76 said:
If your plan allows it...
Hastily spouted for your befuddlement
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i have it on my dads add a line line 500 minutes unlimited messages 2 gigs. can you not add to prepay??
deeznutz1977 said:
i have it on my dads add a line line 500 minutes unlimited messages 2 gigs. can you not add to prepay??
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You can add the feature but it will use your minutes. Prepaids "do not" qualify for this plan. The only benefit for prepay to activate this feature is if you have poor reception this will allow you to still make a phone call.
As others have said, it is free and won't use up your allotted minutes only if you are on a qualifying plan.
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I will give you a more detailed run down.
Actually under a corp plan all wifi calls are free if you add it to that account. Also it doesnt always take mins away. Its more like 70 no 30 yes. From my testing over the last two years.
I work in network security which means I'm in a lot of "heavy secure "wink wink" data centers etc that have zero cell signal for a reason. They use to even bar camera phones. These days they just put a really thin tape over your cameras front & back. So if you even tried removing partly before seeing the "SO" at the exit it will tear and then you got big issues. That being said voip coms are allowed as long as their tied to your imei number like T's.
So wifi calling is needed when I and my guys are at those locations. Other uses as many have said is reception from a poor signal. Tmobile has a great network in the city, its when u get out in the boonies where there's nothing alot of the time. Those times I just click on my VZW MiFi and make call that way or pull over at a McDonalds. Kinda of a end around but being with T allows us alot of flexibility where the other carriers relies on there massively fake reception maps.
Tmobile is great in that it also allows me personally to swap phones easy.
There kinda like a rich man's garage with a dozen super cars, I wake up and pick at will what phone to fly with that day. Doing that on VZW is a pain. Plus the cost for corp plans with Tmobile is about one third of that of VZW or the Death-Star. The only option the other providers have is a wifi extender which requires and hard line and a GPS signal. Try getting that through x amount or so feet of concrete.
As a side note with reception where in the middle of nowhere Ky the only cell and data service was Tmobile.
Typically for me what phone I use depends on what Rom its on. I love cm9/10 but as everyone knows it doesnt support T's wifi calling features. So if im going to be in a secure environment I will have to grab one thats on a samsung kernel with wifi calling. Sometimes I can get away with wifi/google voice or my corp voip pbx but nothing compares to T's 93kb voice codec period.
We never get the excuse that "I couldn't call in cause there wasn't signal" from my guys. So productive has gone up a fare amount due to this tech it also allows better live tracking cause T's employee finder works over any data connection even when outside gps isnt available. So there's more security that my guys feel as we always know where they are if something like a "misunderstanding" comes up.
Does that help? Lol.
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casperi said:
I will give you a more detailed run down.
Actually under a corp plan all wifi calls are free if you add it to that account. Also it doesnt always take mins away. Its more like 70 no 30 yes. From my testing over the last two years.
I work in network security which means I'm in a lot of "heavy secure "wink wink" data centers etc that have zero cell signal for a reason. They use to even bar camera phones. These days they just put a really thin tape over your cameras front & back. So if you even tried removing partly before seeing the "SO" at the exit it will tear and then you got big issues. That being said voip coms are allowed as long as their tied to your imei number like T's.
So wifi calling is needed when I and my guys are at those locations. Other uses as many have said is reception from a poor signal. Tmobile has a great network in the city, its when u get out in the boonies where there's nothing alot of the time. Those times I just click on my VZW MiFi and make call that way or pull over at a McDonalds. Kinda of a end around but being with T allows us alot of flexibility where the other carriers relies on there massively fake reception maps.
Tmobile is great in that it also allows me personally to swap phones easy.
There kinda like a rich man's garage with a dozen super cars, I wake up and pick at will what phone to fly with that day. Doing that on VZW is a pain. Plus the cost for corp plans with Tmobile is about one third of that of VZW or the Death-Star. The only option the other providers have is a wifi extender which requires and hard line and a GPS signal. Try getting that through x amount or so feet of concrete.
As a side note with reception where in the middle of nowhere Ky the only cell and data service was Tmobile.
Typically for me what phone I use depends on what Rom its on. I love cm9/10 but as everyone knows it doesnt support T's wifi calling features. So if im going to be in a secure environment I will have to grab one thats on a samsung kernel with wifi calling. Sometimes I can get away with wifi/google voice or my corp voip pbx but nothing compares to T's 93kb voice codec period.
We never get the excuse that "I couldn't call in cause there wasn't signal" from my guys. So productive has gone up a fare amount due to this tech it also allows better live tracking cause T's employee finder works over any data connection even when outside gps isnt available. So there's more security that my guys feel as we always know where they are if something like a "misunderstanding" comes up.
Does that help? Lol.
Sent from my SGH-T889 using xda premium
Click to expand...
Click to collapse
Lol ya that explains it a lil. I live in Las Vegas and I never lose signal anywhere. I guess that why I never understood. But when people are saying no reception is that mean no data either? Cause even if you have no reception but have data. Can't you use a 3rd party app that makes calls over data (not wifi)
Cell and data are basically the same as voice runs over the data lines pulled to the towers. It will be even more so as carriers upgrade to LTE-rev14 I think which is from my understanding is pure carrier level voice IP network vs switched network now.
Basically now voice is segmented out to a Nortel, Lucent, Alcatel gear to handle the phone side and then data is routed to their respective network gear. In a pure IP network both voice and data are run data only. Voice will be filtered out with QoS rules with along with virtual pbx box vs the circuit switched like we have now. The advantages of going pure IP are
1) Carriers are no longer tied to large circuit switched gear that runs into the millions and is proprietary to each manufacturer's specs. So the carriers try to buy just one type of pbx so not to run into compatibility issues. Just replacing a line card which typically hosts 129 lines at the "CO" known as central office is always same day aired if they don't have a replacement handy and those cards run 5 or so grand a piece. So downtime is a problem and cost vs ROI is as well.
2) In a pure voice IP setup the carriers can run a virtual PBX that is software bound vs hardware that the call is then routed via data to CO or datacenter to the last leg to terminate the call with say level 3 being your terminating host that then routes the call from there. If that call is cell phone to cell phone then it can stay data the entire way. This cost the carriers fare less as the hardware is agnostics, think vmware etc. Also audio codec on the BOX and towers can be adjusted in learning mode and then into dynamic mode as to give the callers the best overall call experience and if the tower gets loaded down with calls that gear can downgrade to a lower codec to handle more call volume. Think rush hour traffic where your stuck and everyone is on their cell. I could go into more details but you would fail asleep but this killer feature alone.
Bottom line is this cost the carriers far less, the audio codec used has much better call quality and can be setup to be dynamic to the load of individual towers vs switched which is hard coded. Downtime is dramatically reduced as there's no actual phone/linecards to go bad.
Many T-Mobile users "use" the Wi-Fi calling feature because it just sounds better. The reason that is because the audio codec "your call" runs around 96kbs. With voice over LTE "depending on tower config and load" can provide the same call quality. For example vzw cell call is 4.7kbs "data" which means that call is heavily compressed. You can tell if you listen, the bass and highs are gone. It's like talking to someone that speaks monotone. The reverse, GSM to GSM call uses a audio codec in the 14.8kbs range and sounds awesome. Even better is two T-Mobile callers using Wi-Fi calling. The problem the carriers have is CDMA to GSM or the other way around, all those calls sound like crap cause the voice gear has to downgrade or upscale to meet the setting of caller and vzw doesn't scale higher than 9.2kbs so the convo sounds mutilated with call echo, drop data packets which sounds like garbage like distorted audio. Think Sat radio when you go under a long bridge. Voice over LTE "voice over data" will allow all carriers gear to talk correctly and adjust audio codecs correctly on the fly giving the callers the best call possible.
I know I went WAY beyond and in depth but I love this stuff and its fun to share it with others.
Casperi
Sent from my SGH-T989 using xda premium
Reception is one thing, but there is another reason..
For people that travel frequently outside the Tmobile coverage area (ie: International).. Wi-Fi calling is important and critical.. Even with a Corp plan, international minutes when you need to call back to the US is expensive and without having to deal with call forwarding, or grabbing a local SIM.. (though I usually get one for data)

LTE in Chi-town...

Any GN2 owners around Chi-town?
Really wondering how the GN2 holds up with data and voice versus the E4GT.
2 biggest issues I have:
1) Signal drops to near 0 inside office
2) 4G? What 4G? (Inside office can't even get 3G!?!)
If LTE will work inside because of being on a different frequency it may be enough to convince the missus.
But if voice and data aren't good she still wants to consider a different carrier.
garwynn said:
Any GN2 owners around Chi-town?
Really wondering how the GN2 holds up with data and voice versus the E4GT.
2 biggest issues I have:
1) Signal drops to near 0 inside office
2) 4G? What 4G? (Inside office can't even get 3G!?!)
If LTE will work inside because of being on a different frequency it may be enough to convince the missus.
But if voice and data aren't good she still wants to consider a different carrier.
Click to expand...
Click to collapse
Everything is crap in the loop. Everything works fine in the burbs. Depends where you use it. Verizon is the best service in the loop for LTE. Sprint is unlimited but uses frequencies and a network that's not built out yet that make it less than optimal. Don't even dream of loop office LTE working well anytime soon.
We're mainly around O'Hare... I work off of Touhy/Higgins and missus works on opposite side. Both of us get great signals outside, it's inside that hurts.
FWIW Tmo and Verizon seem affected... which is why I think it is more the bldg and less the carrier I'm using.
Sent from my SPH-D710 using Tapatalk 2

Is it normal to lose data when receiving a phone call. I've been using HTC devices fo

sent from my tired mind
No CDMA device transmits data and cellular at the same time.
063_XOBX said:
No CDMA device transmits data and cellular at the same time.
Click to expand...
Click to collapse
I believe it is LTE devices that will not lose data. CDMA only devices WILL lose data when on a phone call. Am I incorrect?
Do I need to have my intentional misinformation detector sent in for service?
WiredPirate said:
I believe it is LTE devices that will not lose data. CDMA only devices WILL lose data when on a phone call. Am I incorrect?
Do I need to have my intentional misinformation detector sent in for service?
Click to expand...
Click to collapse
The technology in LTE networks doesn't handle voice transmissions it only does data. So when you place a phone call on LTE it’s actually rolling back to the carrier’s older network to use CDMA tech to make the call.
I'm on Verizon and I can do both at the same time. I just tested it.
Well I believe you answered my question about this particular device but just to be clear both my Evo 4G and my evo 4G LTE would maintain data connection while I was talking on the phone not in an LTE area
sent from my tired mind
firecaulk said:
Well I believe you answered my question about this particular device but just to be clear both my Evo 4G and my evo 4G LTE would maintain data connection while I was talking on the phone not in an LTE area
sent from my tired mind
Click to expand...
Click to collapse
No they didn't. You were either on Wifi or they in fact did lose their data. None of the CDMA data+voice protocols are enacted by any US carrier.
firecaulk said:
Well I believe you answered my question about this particular device but just to be clear both my Evo 4G and my evo 4G LTE would maintain data connection while I was talking on the phone not in an LTE area
sent from my tired mind
Click to expand...
Click to collapse
So you are on Sprint? It all depends on the carrier too, I believe. If I remember right, AT&T used to be the only one that could do that that I knew of. I switched to Verizon and realized they didn't have that capability. Then LTE came out and gave that feature to them. I dont know about any other carriers though.
Again let me explain there has been many times I have been using my phone as a hotspot device to watch movies on my ps3 and I would receive a phone call in the middle of the movie I would accept the phone call and keep watching the movie without a problem. There is no LTE in my area of Western Kentucky I am on Sprint with an exceptionally fast 3G connection , I was surprised to find that this device does not have the same capabilities
sent from my tired mind
firecaulk said:
Again let me explain there has been many times I have been using my phone as a hotspot device to watch movies on my ps3 and I would receive a phone call in the middle of the movie I would accept the phone call and keep watching the movie without a problem. There is no LTE in my area of Western Kentucky I am on Sprint with an exceptionally fast 3G connection , I was surprised to find that this device does not have the same capabilities
sent from my tired mind
Click to expand...
Click to collapse
If you used the Evo 4G it may have been connected to data via 4G, which is not the same as LTE. You can do the same with LTE being connected and voice calls. However it can't be done with 3g and voice as they use the same radio and like the above post says no US carriers have that technology. The only reason 4G and LTE works is becase they are data only on seperate radios. Of course it could have been magic.
G-Nexus Sent
firecaulk said:
Again let me explain there has been many times I have been using my phone as a hotspot device to watch movies on my ps3 and I would receive a phone call in the middle of the movie I would accept the phone call and keep watching the movie without a problem. There is no LTE in my area of Western Kentucky I am on Sprint with an exceptionally fast 3G connection , I was surprised to find that this device does not have the same capabilities
sent from my tired mind
Click to expand...
Click to collapse
Well I dont know then. All I know is that my Verizon Galaxy Nexus does both internet and calls at the same time with no issues.
I am posting this during an active call, with no 4g connection
Sent from my EVO using xda app-developers app
I'm just wondering why any download I'm attempting to make will stop whenever I receive a phone call with my Galaxy Nexus?
Sent from my EVO using xda app-developers app
firecaulk said:
I'm just wondering why any download I'm attempting to make will stop whenever I receive a phone call with my Galaxy Nexus?
Click to expand...
Click to collapse
Its not a difficult concept. Your data connection is being cut off because you're on a phone call. You might manage to post (something that can be done on even the slowest weakest connection) but something as intensive as downloading is always going to be interrupted.
063_XOBX is mostly correct.
the CDMA GN has a CDMA radio and a LTE radio. if you are not on LTE and you get a phone call, your data will shut off.
most HTC phones (esp the EVO) have a radio chip which allows data and voice at the same time as there are 2 CDMA radios in the phone.
Zepius said:
063_XOBX is mostly correct.
the CDMA GN has a CDMA radio and a LTE radio. if you are not on LTE and you get a phone call, your data will shut off.
most HTC phones (esp the EVO) have a radio chip which allows data and voice at the same time as there are 2 CDMA radios in the phone.
Click to expand...
Click to collapse
Thank you for your reply, I really love XDA community I knew I could count on somebody for the answer
sent from my tired mind
063_XOBX said:
No they didn't. You were either on Wifi or they in fact did lose their data. None of the CDMA data+voice protocols are enacted by any US carrier.
Click to expand...
Click to collapse
SVDO, while not officially supported, is alive and well. The Thunderbolt, Rezound, Incredible 4G, Viper, and Galaxy S3 on VZW are a handful of phones that are capable of simultaneous voice and 3G data.
Sent from my Nexus 7 using Tapatalk HD
063_XOBX said:
The technology in LTE networks doesn't handle voice transmissions it only does data. So when you place a phone call on LTE it’s actually rolling back to the carrier’s older network to use CDMA tech to make the call.
Click to expand...
Click to collapse
No, VoLTE is not yet available, hopefully soon. That is not what I was saying. LTE handles data during a call, and CDMA handles the voice. If you are not on LTE or WiFi, there will be no data while on the call.
063_XOBX said:
You were either on Wifi or they in fact did lose their data. None of the CDMA data+voice protocols are enacted by any US carrier.
Click to expand...
Click to collapse
You are correct if only taking about CDMA. Cant say for any other carrier, but 100% with VZW you can do simultaneous data/voice if you are in LTE coverage.
Zepius said:
063_XOBX is mostly correct.
the CDMA GN has a CDMA radio and a LTE radio. if you are not on LTE and you get a phone call, your data will shut off.
most HTC phones (esp the EVO) have a radio chip which allows data and voice at the same time as there are 2 CDMA radios in the phone.
Click to expand...
Click to collapse
THIS.
najaboy said:
SVDO,
Click to expand...
Click to collapse
thats the term i was looking for. thanks
Zepius said:
063_XOBX is mostly correct.
the CDMA GN has a CDMA radio and a LTE radio. if you are not on LTE and you get a phone call, your data will shut off.
most HTC phones (esp the EVO) have a radio chip which allows data and voice at the same time as there are 2 CDMA radios in the phone.
Click to expand...
Click to collapse
WiredPirate said:
No, VoLTE is not yet available, hopefully soon. That is not what I was saying. LTE handles data during a call, and CDMA handles the voice. If you are not on LTE or WiFi, there will be no data while on the call.
You are correct if only taking about CDMA. Cant say for any other carrier, but 100% with VZW you can do simultaneous data/voice if you are in LTE coverage.
THIS.
Click to expand...
Click to collapse
To correct something I saw on this thread (and to complement previous commentaries):
- LTE is considered to be a 4G technology
In March 2008, the International Telecommunications Union-Radio communications sector (ITU-R) specified a set of requirements for 4G standards, named the International Mobile Telecommunications Advanced (IMT-Advanced) specification, setting peak speed requirements for 4G service at 100 megabits per second (Mbit/s) for high mobility communication (such as from trains and cars) and 1 gigabit per second (Gbit/s) for low mobility communication (such as pedestrians and stationary users).[1]
Since the first-release versions of Mobile WiMAX and LTE support much less than 1 Gbit/s peak bit rate, they are not fully IMT-Advanced compliant, but are often branded 4G by service providers. On December 6, 2010, ITU-R recognized that these two technologies, as well as other beyond-3G technologies that do not fulfill the IMT-Advanced requirements, could nevertheless be considered "4G", provided they represent forerunners to IMT-Advanced compliant versions and "a substantial level of improvement in performance and capabilities with respect to the initial third generation systems now deployed".
Click to expand...
Click to collapse
- UMTS handles voice with a data call active at the same time.
Sent from my Nexus

Simultaneous voice + data on Verizon?

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.

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