Develop Bugs

VoLTE support

Hi guys,
I just wonder if M9 supports VoLTE calling. My carrier told me that HTC M9 will never support this function because I have to have stock rom literally from my Vodafone Czech carrier. But it seems to me that in that case nobody with alternative roms could use this function so my question is..does it support VoLTE if I will root my device and install some patch what I've seen here for volte support or do I have to install another Rom which supports VoLTE or any other ideas? Does my carrier have to really support precisely my model or is it just software issue on my side? I have newest Android 7 stock. Thanks for all replies!

Yes, the M9 absolutely supports VoLTE. Disclaimer: I have one on the desk next to me fully operational on a large carrier in the USA.
Given that, your network and your device work in unison to make the 'magic' work. You'll need an IMS APN programmed in the device, and one in the LTE network that validates the new default (signalling) bearer. My suggestion is to chat with a knowledgeable tech support rep. at your carrier, and be sure to ask if there's extra charge for the VoLTE. Since carriers understand that legacy circuit switched infrastructure has a limited future, they *should* be willing to move all your voice/SMS/MMS over to the IMS/LTE network they've invested in.
Best of luck.

kidFromBigD said:
Yes, the M9 absolutely supports VoLTE. Disclaimer: I have one on the desk next to me fully operational on a large carrier in the USA.
Given that, your network and your device work in unison to make the 'magic' work. You'll need an IMS APN programmed in the device, and one in the LTE network that validates the new default (signalling) bearer. My suggestion is to chat with a knowledgeable tech support rep. at your carrier, and be sure to ask if there's extra charge for the VoLTE. Since carriers understand that legacy circuit switched infrastructure has a limited future, they *should* be willing to move all your voice/SMS/MMS over to the IMS/LTE network they've invested in.
Best of luck.
Click to expand...
Click to collapse
Thanks for detail info. VoLTE is new in our country so I couldn't get any tech info even from my carrier. And I already found out that VoLTE isn't extra charged and even video calls are for the same price so that's great but I have to find precise info about IME apn setting. I hope somebody tell me precise settings. Thanks for info again!

Volte is carrier dependent. Both phones must be capable, both carriers must be capable. The problem is that Volte is not cross carrier at the moment so you and the person you're calling must both be on the SAME carrier, the carrier must be Volte capable, both with Volte compatible phones, both in a 4g signal area.
4g is a data only protocol with voice capabilities "patched" in to it. 4g was NEVER designed to carry voice signals so don't expect carriers to be in a hurry to implement Volte when 5g is just around the corner.
As to the answer to your question. Yes, The m9 is in fact Volte capable so it is purely down to the carrier investing in new technology. Carriers are NOT obliged to roll out Volte in any case. It is purely a case of demand vs supply. We already have a perfectly good 2g-3g infrastructure for voice and data so 4g only offers better data connections depending on signal strength. I think a lot of carriers are going to hold back for a while until the technology becomes proven or more so, an ISO standard is put in place.
Beamed in by telepathy.

shivadow said:
Volte is carrier dependent. Both phones must be capable, both carriers must be capable. The problem is that Volte is not cross carrier at the moment so you and the person you're calling must both be on the SAME carrier, the carrier must be Volte capable, both with Volte compatible phones, both in a 4g signal area.
4g is a data only protocol with voice capabilities "patched" in to it. 4g was NEVER designed to carry voice signals so don't expect carriers to be in a hurry to implement Volte when 5g is just around the corner.
As to the answer to your question. Yes, The m9 is in fact Volte capable so it is purely down to the carrier investing in new technology. Carriers are NOT obliged to roll out Volte in any case. It is purely a case of demand vs supply. We already have a perfectly good 2g-3g infrastructure for voice and data so 4g only offers better data connections depending on signal strength. I think a lot of carriers are going to hold back for a while until the technology becomes proven or more so, an ISO standard is put in place.
Beamed in by telepathy.
Click to expand...
Click to collapse
Thanks for answer. My carrier already support VoLTE technology and we also have around 95% coverage of LTE infrastructure and I know both must have VoLTE support and LTE connection.
What I am trying to is use this technology if I am able to. My carrier told me it's not possible because my phone is old for it but I've read few articles that it's possible.
What I don't know if I need some option in settings (rom implemented settings) to activate it because I don't have any inside, on the other side when I go to cellular info through *#*#4636#*#* I have info about IMS and also about VoLTE what I can switch off.
So generally is it enough to find out how to setup IMS APN in settings to run VoLTE on my device or do I need also ROM which have implemented in settings VoLTE on/off?
Maybe I just don't get it correctly but I would like to have precise info what I need to get from my carrier to set up IMS APN on my device to run VoLTE if it's possible of course.
Hope it is understandable.

So no need to any special futures implemented in Android. It's enough to set up APN for IMS and LTE bearer.

The only device that needs adjusting for volte is the dev edition, i believe.
Otherwise this device is completely volte compatible. Maybe your carrier representative is confused..
Beamed in by telepathy.

So I finally talked with someone who knows more technical info from my carrier but he told me that it's all about radio bearers, channels of phone (don't know precise terminology) and my phone has to be unlocked for that channel, so it's kind of firmware problem because in our country isn't firmware unlocked for that channels yet. And nobody knows if it will be. Also each carrier has different channel for that and that's why it's incompatible with the same phone from another carrier.
I've seen also some utility to change that radio settings over PC with debugging mode on but don't know more info about it. So I guess I can try this for a last option.

If your phone is locked to carrier and branded then there is a possibility they've switched volte off but if your firmware region is 401 then your carrier rep is talking s**t as all 401 wwe (unbranded) phones are volte ready and it is the carrier who is lacking the technology.
Beamed in by telepathy.

dove9213 said:
Hi guys,
I just wonder if M9 supports VoLTE calling. My carrier told me that HTC M9 will never support this function because I have to have stock rom literally from my Vodafone Czech carrier. But it seems to me that in that case nobody with alternative roms could use this function so my question is..does it support VoLTE if I will root my device and install some patch what I've seen here for volte support or do I have to install another Rom which supports VoLTE or any other ideas? Does my carrier have to really support precisely my model or is it just software issue on my side? I have newest Android 7 stock. Thanks for all replies!
Click to expand...
Click to collapse
Are your firmware 4.16.166.1 (0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_CH-DE_4.16.166.1_R_Radio_01.01_U114401011_117.00.61117G_2_F_release_491767)?
Could you upload all /system/customize folder and /system/build.prop file?
I'll try to help you.

Golv said:
Are your firmware 4.16.166.1 (0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_CH-DE_4.16.166.1_R_Radio_01.01_U114401011_117.00.61117G_2_F_release_491767)?
Could you upload all /system/customize folder and /system/build.prop file?
I'll try to help you.
Click to expand...
Click to collapse
Thanks for any help, here is link for all data you wanted, if you'll need anything, just let me know.
https://drive.google.com/file/d/0Bz1KtU1dj8brT3ZieUkzeXRPRzA/view?usp=drivesdk

dove9213 said:
Thanks for any help, here is link for all data you wanted, if you'll need anything, just let me know.
https://drive.google.com/file/d/0Bz1KtU1dj8brT3ZieUkzeXRPRzA/view?usp=drivesdk
Click to expand...
Click to collapse
Are you sure that your firmware for Vodafone Czech should be 4.17.161.11, but not 4.16.166.1??? And are you S-Off?
Just for info:
0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_UK_4.17.161.11_Radio_01.01_U114401031_124.01.70203G_F_release_496309_signed
0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_CH-DE_4.16.166.1_R_Radio_01.01_U114401011_117.00.61117G_2_F_release_491767_signed

Golv said:
Are you sure that your firmware for Vodafone Czech should be 4.17.161.11, but not 4.16.166.1??? And are you S-Off?
Just for info:
0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_UK_4.17.161.11_Radio_01.01_U114401031_124.01.70203G_F_release_496309_signed
0PJAIMG_HIMA_UHL_N70_SENSE80_MR_Vodafone_CH-DE_4.16.166.1_R_Radio_01.01_U114401011_117.00.61117G_2_F_release_491767_signed
Click to expand...
Click to collapse
From getvar info I find out that it's probably phone from Germany or UK. And I'm S'On. Is it getting me to insoluble situation?

dove9213 said:
From getvar info I find out that it's probably phone from Germany or UK. And I'm S'On. Is it getting me to insoluble situation?
Click to expand...
Click to collapse
If you have TWRP 3.1.0.0 installed you can flash attached patch via TWRP and check option Settings - Call - VoLTE enable/disable
Make FULL nandroid backup before!!!
HTC_M9_Vodafone_UK_VOLTE_support_v1.zip

Golv said:
If you have TWRP 3.1.0.0 installed you can flash attached patch via TWRP and check option Settings - Call - VoLTE enable/disable
Make FULL nandroid backup before!!!
HTC_M9_Vodafone_UK_VOLTE_support_v1.zip
Click to expand...
Click to collapse
Thank you, I don't have for now rooted M9, because I bough it recently and until now I tried to find out all option if it's possible in some way but I'll do it and try it later. Thank you very much for your help!

So I've tried and it doesn't work, no VoLTE , no Wi-Fi calling, so I am not sure what could be wrong. I can see setup in system and it's enabled but none of this works. Is there any log or anything what I can explore why it's not working? My carrier has a app for Wi-Fi calling so I wouldn't need it as a part of system but there could be setup which I need also for VoLTE if I get it right. Or is there any other flashable file for trying?

Golv said:
If you have TWRP 3.1.0.0 installed you can flash attached patch via TWRP and check option Settings - Call - VoLTE enable/disable
Make FULL nandroid backup before!!!
HTC_M9_Vodafone_UK_VOLTE_support_v1.zip
Click to expand...
Click to collapse
Actually VoLTE works out-of-the-box with this Vodafone UK rom, but thanks, am using the rom now in India with Reliance Jio.

VoLte And Video Call in Verizon M9
Hi Guys,
i have tried t-mobile rom for volte it worked great. also i notices that if i am changing firmware , volte is not working , as the volte options are still showned, when i get back to t-mobile firmware its worked. so i also searched that t-mobile rom has integrated IR92 lte support for volte, RCS integration and many things. Were i found that Verizon version has Integrated IR94 lte support for voice and video call over lte.
So Can any one help me further for this.

Golv said:
If you have TWRP 3.1.0.0 installed you can flash attached patch via TWRP and check option Settings - Call - VoLTE enable/disable
Make FULL nandroid backup before!!!
HTC_M9_Vodafone_UK_VOLTE_support_v1.zip
Click to expand...
Click to collapse
I have an AT&T running latest firmware unlocked rooted s-off the whole nine yards and my VoLTE will not work I can go into *#*#4636#*#* and turn on the provisions for it but when I exit it turns back off I guess I'm going to have to go back stock cause this sux I bet I've missed 15 calls today!

Not getting VoLTE on T-mobile on XT1710-06 version

Is or has anyone else been able to get VoLTE working on T-Mobile US on this model specifically? LTE and WiFi Calling work in general, but the "Enhanced 4G LTE Mode" toggle isn't there to allow VoLTE. The model has the same number of bands as the XT1710-01 model, but is on the RETLA channel, by the way.

Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.

Vesaniaheim said:
Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.
Click to expand...
Click to collapse
Apologies for the late reply. Definitely no VoLTE or HD voice between me and other T-Mobile users. No matter what I tried it just never came up. If anyone's considering using this specific variant of the phone in the US, I'd be aware of the limits beforehand.

politiclaw said:
Apologies for the late reply. Definitely no VoLTE or HD voice between me and other T-Mobile users. No matter what I tried it just never came up. If anyone's considering using this specific variant of the phone in the US, I'd be aware of the limits beforehand.
Click to expand...
Click to collapse
-06 is a North American dual sim variant, correct?
Are both SIM cards on t-mobile?
Could one use SIMS from different carriers?

pizza_pablo said:
-06 is a North American dual sim variant, correct?
Are both SIM cards on t-mobile?
Could one use SIMS from different carriers?
Click to expand...
Click to collapse
-06 is a North American dual sim variant, correct. Updates should go through ATT Mex, I believe. And yes, you can use sims from other carriers. I used one sim card when I tried it and only utilized one of the sim slots as a result. T-Mo VoLTE just doesn't seem to have been certified for that variant.

So T-Mobile WIFI calling works on this variant of the Z2 Play? If so that is good to know especially when traveling overseas even if some other advanced features don't work.

I have an XT1710-06 retla device and I can confirm that wifi calling with T-mobile does *NOT* work on my device. There is a setting to enable wifi calling, but it never seems to connect and all calls still go over mobile. This is 100% testable if I for instance go into a deep basement that has wifi but no cellular signal -- I can browse the internet but cannot make phone calls or SMS, even though I have wifi calling turned on.
This is probably related to why VoLTE doesn't work either.
Also (as mentioned in another thread) still no updates for it past February 7.1.1 update. No later security updates and no Oreo updates.

Vesaniaheim said:
Hi, actually I was having similar issues. VoLTE, seems to be different but is based on your Carrier mostly. If you call someone from a different carrier it may not be enabled. I'm with AT&T, whenever I call someone with AT&T and we are both with good 4g LTE, in the call, changes the status to HD. But, just with AT&T. At least that's how it Works for me. We should wait someone to confirm is this is how other carries behave.
Click to expand...
Click to collapse
Hi,
I'm super curious how did you get your Z2 Play to have VoLTE. I 've tried everything - new sim, IMEI of ATT branded phone, activated SIM on ATT phone, etc. , to no avail. I'm so frustrated and about to get another phone, because my HSPA signal is much weaker than LTE where I'm at and constantly have missed (straight to voicemail) or dropped calls. Please, let me know how did you get it to work.
Thanks

Maybe the problem is VolTE itself. As I tested. Unless both phones are with the same carrier and working good over 4G (good signal area) you can't get it working. At least in where I live that was true for a friend's phone and mine. So VolTE was good, until signal dropped hard. But impossible to work with other carriers.
Even it was good under Lineage OS and tested with Toxyc OS, but I saw the main thing is that 4G LTE should be firstly working fine. And same for anyone you call. Otherwise call will be normal. And for 4G LTE it depends on area support too.
Sorry for late reply

G1Hope said:
I have an XT1710-06 retla device and I can confirm that wifi calling with T-mobile does *NOT* work on my device. There is a setting to enable wifi calling, but it never seems to connect and all calls still go over mobile. This is 100% testable if I for instance go into a deep basement that has wifi but no cellular signal -- I can browse the internet but cannot make phone calls or SMS, even though I have wifi calling turned on.
This is probably related to why VoLTE doesn't work either.
Also (as mentioned in another thread) still no updates for it past February 7.1.1 update. No later security updates and no Oreo updates.
Click to expand...
Click to collapse
Same phone (XT1710-06 retla, rooted stock ROM on Oreo), and wifi calling on Tmobile also doesn't work for me. I can enable it in Settings, but I cannot send SMS or make calls over wifi with no cell service. After a while (a few hours) I get a Moto Settings notification that it can't enable Wifi calling, with a message underneath that says "Enabling." I can't dismiss the notification, only snooze it for up to 2 hours, and after I disable wifi calling it does eventually go away after a couple days.

Your problem is because none of the XT1710 variations have the 600MHz Band 71. It is the most recently added band and very few phones currently out there support it yet. As far as the HD voice issues mentioned...both people on the call have to be using a Volte supported phone and then HD automatically activates.

Wi-Fi calling on pixel 2 XL in Europe

I have a Pixel 2 XL in Android 10 build QQ1A.191205.008 and there is no option to enable Wi-Fi calling.
I know that the phone is capable of Wi-Fi calling but for some reason that option does not exist in system settings
I am in Greece and in Vodafone network which is providing Wi-Fi calling
And help would be appreciated.

Is the device itself on Vodafone, or are you using a different carrier? Your carrier has to support it for the option to become available, and even if the carrier does there is a possibility the carrier's network doesn't recognize the device as being capable of the feature, especially if it was bought from Google.

Thanks for your reply.
Yes it was bought in the USA.
The ROM does not belong to a certain carrier
It's the official universal room
I haven't root the phone.
It gets all the updates over the air.
A standard factory set phone.
I conducted Vodafone and apparently they don't support yet Android 10 ! Although they state that the Samsung s8 and newer and the iPhones are supported (they don't mention any Google phone)
Anyway I thought that the option to enable Wi-Fi calling should be available on the system settings of the phone.

dimitrisss said:
Thanks for your reply.
Click to expand...
Click to collapse
ROM is irrelevant as this is a carrier thing. As you found out the carrier you're using doesn't yet support the feature. Thus you will have to do without. The P2XL won't have the option to enable WiFi calling until the carrier supports it. Example: my carrier (Straight Talk) doesn't support WiFi calling and I do not have the option in my settings.

Okay crystal clear
Thanks a lot

Okay crystal clear
Thanks a lot

VoLTE/Wifi

Question about the impending doom of custom roms. I'm with T-Mobile and don't want to switch. So are texts included in this as well, or are only voice calls affected?

nola mike said:
Question about the impending doom of (LOS-based) custom roms. I'm with T-Mobile and don't want to switch. So are texts included in this as well, or are only voice calls affected?
Click to expand...
Click to collapse
You are talking about this:
All U.S. V30/V3O+/V30S will need stock firmware, not LOS-based custom ROMs. When?
The first post is the most relevant. By page 3 the discussion had digressed into other areas.
At first, I thought only voice calls should be affected. (But... don't you need voice calls? Or do you have something like Google Voice? I have Google Voice but in the U.S. I still piggyback on my carrier's assigned phone number.)
(backstory, skip over this if you already know it)
4G LTE started out as "data only". Initially carriers had you temporarily dropping down to 3G (HSPA or CDMA) for voice calls until VoLTE (Voice Over LTE) was perfected.
But for V30 LOS custom ROMs -- which don't have VoLTE -- users still needed this temporary 3G access during phone calls. After the phone call is over, then you jump back to LTE (data only).
Now that 5G is being rolled out, U.S. carriers are killing off 3G to use those resources for 5G. AT&T is keeping 3G HSPA until February 2021, but initially it was reported Verizon and T-Mobile (Sprint) -- and their MVNOs -- are ending 3G in the next couple months. Verizon by January 1, 2020 and T-mobile allegedly in "January 2020" but they have set a specific day of the month that I've seen.
HOWEVER. HOWEVER...
T-Mobile may not be abruptly ending 3G HSPA in January 2021.
Instead T-Mobile says if your phone is not VoLTE capable by sometime in January 2021 it will be shut out of their network. This is not saying they are shutting down 3G HSPA in January 2021 -- just forcing all phones on T-mobile network to be VoLTE capable for WHEN they do shut down.
Hmmmm...
This potentially means you could still use custom ROMs a while longer if you somehow pass their VoLTE capable test? Because 3G HSPA may still be available for a while longer.
On the other hand if you do NOT pass their test, you can't use their network for texting either!
_____________
(Go to article below to see complete instructions and screenshots.)
How to find out if your T-Mobile phone has VoLTE support
T-Mobile will shut out all incompatible devices next year (2021).
Check the Settings app
If your phone is already activated on T-Mobile, you can check in your phone's settings if VoLTE is being used. Open the Settings app on your phone and go to the 'About phone' menu, then tap on 'SIM Status'. If you can't find it, try pressing the search button in the app and typing SIM.
Once you find the SIM Status option, tap it, and a popup should appear. If the voice network type is listed as LTE, you're good to go.
If your Settings app doesn't have that menu for whatever reason, try dialing *#*#4636#*#* in your Phone app. This will take you to a hidden diagnostics menu. Select 'Phone information,' then check if LTE is listed under Voice Network Type.

Ok, I had read some of this before, but not all. My phone passes those VoLTE capable tests. So does that mean that my phone is capable, but still not using VoLTE because it's on a custom rom? But that since it's capable, I'll still be able to use 3g network until 2021? And that once I lose voice, I lose texting as well?

If your carrier completely switches to 4G network then you can't use even text messages without Volte
Though using Google messages with RCS may allow you to get and send text messages with internet connectivity.

nola mike said:
Ok, I had read some of this before, but not all. My phone passes those VoLTE capable tests. So does that mean that my phone is capable, but still not using VoLTE because it's on a custom rom? But that since it's capable, I'll still be able to use 3g network until 2021? And that once I lose voice, I lose texting as well?
Click to expand...
Click to collapse
My best guess, but I'm not T-Mobile:
If your phone passes those tests then it probably won't be locked out of the T-Mobile network in January 2021. If so, then you will still be able to use LOS custom ROM for voice calls, for as long as T-Mobile keeps 3G towers running.
When they do shut off 3G -- may happen gradually, not all at once -- you will not be able to make phone calls on custom ROM without VoLTE, but should still be able to text.
Texts are data, and data-only LTE signal should still allow texting.

Question Unlock version from Google on AT&T in the states

I'm wanting to get the Pro in black with 256gb storage but need to know if anyone is using any unlocked version from Google (not carrier branded that had be unlocked) on AT&T network and getting volte with calls. My company pays for my work # and just gives me the SIM to use in my own phone since I don't want an iPhone that they provide. I currently use a Huawei Mate 20 X and have that SIM working along with my personal # that's on T-Mobile (dual sim phone). Unfortunately due to AT&Ts whitelist any calls made/received on that # switches to 3G, this will make my current phone unusable after they shutdown 3G this Feb.
TIA for any info

I have an unlocked 6 pro on att and I think volte is working but don't know how to verify. I know wifi calling is working which was an issue with my previous unlocked phone

Unlocked Pixel 6 Pro user with ATT here. The wifi-calling works perfect, and surprisingly the visual voicemail is enabled. It seems to work just like an ATT-based phone without the bloatware. Odd thing is you cannot change the mobile network. Read somewhere here the ATT disabled this setting for some reason when connected to their network.

HD Voice (AT&T version of VoLTE) works perfectly well, as does WiFi calling, provided of course your account is provisioned for such.

andrewjae04 said:
I have an unlocked 6 pro on att and I think volte is working but don't know how to verify. I know wifi calling is working which was an issue with my previous unlocked phone
Click to expand...
Click to collapse
Thanks, good to know. Currently with my Mate 20 X when on a call with the AT&T line the network switches from 4G lte (when not on a call) to 3G (when on a call) then back to 4G lte after the call has ended.

Vash369 said:
Unlocked Pixel 6 Pro user with ATT here. The wifi-calling works perfect, and surprisingly the visual voicemail is enabled. It seems to work just like an ATT-based phone without the bloatware. Odd thing is you cannot change the mobile network. Read somewhere here the ATT disabled this setting for some reason when connected to their network.
Click to expand...
Click to collapse
@Vash369 - thanks for sharing your feedback. does your unlocked P6P support dual SIM, e.g., physical sim card and an e-sim?

d.cortez said:
@Vash369 - thanks for sharing your feedback. does your unlocked P6P support dual SIM, e.g., physical sim card and an e-sim?
Click to expand...
Click to collapse
I'm not who you asked, but I believe all the factory unlocked P6Ps support dual SIM via a discreet SIM card and the built-in e-SIM.

d.cortez said:
@Vash369 - thanks for sharing your feedback. does your unlocked P6P support dual SIM, e.g., physical sim card and an e-sim?
Click to expand...
Click to collapse
Yep it does. It shows this in Google's spec sheet page. Mind you I'm only using physical SIM. So I don't know if both will work at the same time

Another unlocked/rooted P6P working fine on AT&T here. I just sim swapped from my old phone and it worked right out of the box.