Develop Bugs

VoLTE on AT&T

Does this work? Does anyone know how to enable it?

Great thread. I wonder if we can enable it because it does not work with any custom roms

It's been confirmed working on the pure nexus ROM. Check the development thread

It has not been confirmed working on att. I follow that thread closely. It's is working on Verizon and Tmobile.
I am running pure nexus with att and no volte

stu5797 said:
It has not been confirmed working on att. I follow that thread closely. It's is working on Verizon and Tmobile.
I am running pure nexus with att and no volte
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My apologies. I must've read it wrong then

Stu, do you have a VoLTE enabled SIM in your 5X? You have to have an account in the HSS and TAS to get an IMS registration...

I really don't know. Is volte working for you on att and the nexus 5? I don't think it can work but I hope I am wrong

Did you just pull the SIM from an existing phone? If so, was it a VoLTE phone? AT&T will only provision the SIM/Account for VoLTE if you have an approved device.
And no, I have not gotten my 5X to do VoLTE yet....working on it.

My friend just got Nexus 6P + new AT&T sim card. We made couple of calls and there is no VoLTE option in the cellular settings, as I have with my 5X on T-Mobile.

Remember that any VoLTE network is *completely* different than the existing CDMA/GSM/UMTS networks that the providers have. VoLTE utilizes an IMS or USP core that the phone has to register on to get VoLTE calls to work. The SIM information has to be defined within this IMS core, otherwise you will only get legacy services.
AT&T will currently only define a SIM for VoLTE is you have a certified device that they sell. But I already have VoLTE phones and am trying to use their SIMs without success. I think the 5X software may not be allowing the IMS registration. If you are on T-Mob I would call them up and see if they will provision your SIM for IMS....they don't seem to care about what phone you use.

AT&T wifi calling and VoLTE?

Will this be available for the Pixel 2 on AT&T?

jtl6060 said:
Will this be available for the Pixel 2 on AT&T?
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Most likely not....I have the N6P and it doesn't for work for me. They basically refuse to provision an account with the enhanced services like wifi calling and volte if you didn't buy the phone from them. They are the only remaining carrier that I know of that doesn't allow use of the enhanced services when you BYOD.
I have a theory though.....if you get a phone that they sell that has the enhanced capabilities and have them turn the services on...then you swap out the Sim and put that Sim in your pixel 2xl it should work.....
I thought about doing it but I don't need wifi calling and the VoLte and enhanced sms only work if the person on the other end has the same carrier and capable phone and the features turned on....so didn't think it was worth it try try out.

bsg411 said:
Most likely not....I have the N6P and it doesn't for work for me. They basically refuse to provision an account with the enhanced services like wifi calling and volte if you didn't buy the phone from them. They are the only remaining carrier that I know of that doesn't allow use of the enhanced services when you BYOD.
I have a theory though.....if you get a phone that they sell that has the enhanced capabilities and have them turn the services on...then you swap out the Sim and put that Sim in your pixel 2xl it should work.....
I thought about doing it but I don't need wifi calling and the VoLte and enhanced sms only work if the person on the other end has the same carrier and capable phone and the features turned on....so didn't think it was worth it try try out.
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Click to collapse
It has to be a Google issue wether it's certifications or license issue. Someone much more in touch with how it all works would probably have a better answer. Purchased my wife's iPhone 8 unlocked (not carrier specific) from Apple directly not through AT&T. Her WiFi calling works. I'm also on the 6P and upgrading to Pixel 2XL even if it doesn't work? I guess I could try to put her sim into my phone when I get it.

jtl6060 said:
It has to be a Google issue wether it's certifications or license issue. Someone much more in touch with how it all works would probably have a better answer. Purchased my wife's iPhone 8 unlocked (not carrier specific) from Apple directly not through AT&T. Her WiFi calling works. I'm also on the 6P and upgrading to Pixel 2XL even if it doesn't work? I guess I could try to put her sim into my phone when I get it.
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Click to collapse
Trust me...I have researched this extensively. I forgot to mention and serveral several rep confined this..... the only non att branded device they allow to use thier enhanced services is the iPhone bought straight from apple....no Android phones.

Yeah pixel 2 xl not working with enhanced voice. From what I heard the only reason it works with the iPhone is because Apple sets their own rules not the carriers. I think it's crap what they do. Verizon services usually work fine and tmobile works great too but coverage is spotty. I switched from T-Mobile to AT&T and love the coverage just miss being able to buy unlocked phones that will work with volte mainly don't really care for Wi-Fi calling.

My Pixel 2 XL on Oreo 8.1 seems to already have VoLTE enabled.
View attachment 4317131

vpkb said:
My Pixel 2 XL on Oreo 8.1 seems to already have VoLTE enabled.
View attachment 4317131
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On which network?

psg190 said:
On which network?
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AT&T

vpkb said:
AT&T
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Nice. Still no WiFi calling though, correct?
I'm a hack. Now see the grayed out button in your image.

vpkb said:
My Pixel 2 XL on Oreo 8.1 seems to already have VoLTE enabled.
View attachment 4317131
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When you place a call does it still drop to HSPA though?
Would you be willing to place a call and provide a screenshot? I'm really hoping att enabled this.

THEGAMEPLAY94 said:
When you place a call does it still drop to HSPA though?
Would you be willing to place a call and provide a screenshot? I'm really hoping att enabled this.
Click to expand...
Click to collapse
If you call AT&T and get them to provision your IMEI for HD calling, it does indeed work.
EDIT: I should also add, your SIM card serial number last two digits (digits 9 and 10) MUST be greater than 27.
If they are not, you will need to get a new SIM card from AT&T.

THEGAMEPLAY94 said:
When you place a call does it still drop to HSPA though?
Would you be willing to place a call and provide a screenshot? I'm really hoping att enabled this.
Click to expand...
Click to collapse
Mine stays on LTE !

Go into the 4636 menu and see if it's provisioned. It was for me on vz. If it is, go into contacts and press on the 3 dots in the upper right corner. In the settings tab, there is a toggle for wifi calling.

I can confirm that VoLTE works. I contacted AT&T Tech Support this morning and specifically requested for them to update the IMEI # and provision VoLTE (HD Calling). I placed a test call and it sounded great, and stayed on LTE.
Additionally, I requested they Provisioned Wi-Fi calling. The Tech advised the Pixel 2 XL is not compatible but said he provisioned it on the line anyway. I don't think it's working though since it doesn't show that it's provisioned on the device information.

psg190 said:
Nice. Still no WiFi calling though, correct?
I'm a hack. Now see the grayed out button in your image.
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Click to collapse
Here you go, see the HD in the screenshot, and yes, Wi-Calling still DOES NOT work. The AT&T Tech was kind to provision it anyway, maybe Google needs to turn it on as well.

uicnren said:
If you call AT&T and get them to provision your IMEI for HD calling, it does indeed work.
EDIT: I should also add, your SIM card serial number last two digits (digits 9 and 10) MUST be greater than 27.
If they are not, you will need to get a new SIM card from AT&T.
Click to expand...
Click to collapse
That would be the middle digits then right? My SIM card is 20 digits, but digits 9 and 10 are 27.
vpkb said:
Here you go, see the HD in the screenshot, and yes, Wi-Calling still DOES NOT work. The AT&T Tech was kind to provision it anyway, maybe Google needs to turn it on as well.
View attachment 4319415
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You have to be on 8.1 for VoLTE to work anyway right?

sabbotage said:
That would be the middle digits then right? My SIM card is 20 digits, but digits 9 and 10 are 27.
You have to be on 8.1 for VoLTE to work anyway right?
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Click to collapse
if you physically look at the SIM, there is 2 rows of 10 digits, the top row, last 2 digits.
Yours should be fine,
I didnt check on 8.0, but I also didnt see the volte setting in advanced, so Im guessing it is only 8.1 right now.

uicnren said:
if you physically look at the SIM, there is 2 rows of 10 digits, the top row, last 2 digits.
Yours should be fine,
I didnt check on 8.0, but I also didnt see the volte setting in advanced, so Im guessing it is only 8.1 right now.
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Click to collapse
Ahhh ok. Yeah my top row on my SIM card ends with 27. I already had AT&T swap my IMEI on the SIM card since I moved it to my P2 XL from my old Pixel XL. I guess I'll have to ask them to provision VoLTE on my account now too.
Sent from my Pixel 2 XL using Tapatalk

I'm giving this a shot too considering they're advertising the welcoming of the Pixel 2 lineup. It's simply all about whitelisting so they should make this happen!
https://www.att.com/plans/google-pixel.html
The hardware obviously allows it. It's just a matter of AT&T adding the IMEI to their advanced calling lists.

Got them to add this to my account and I'm good to go. I wonder if we'll ever get WiFi calling

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.
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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.
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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?
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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.

LG G710ULM UNSUPPORTED VoLTE ?!? (Straight-Talk US - T-Mobile network)

*********UPDATE********** I bought a new sim from straight talk and VOLTE works now! (GSM compatible Straight Talk Sim card) My old sim was from 2014, so it wasn't VOLTE compatible.
I have an ebay zombie LG G710ULM flashed to latest Google Fi Android 9 software, I received an email from Straight Talk (Wal-Mart US cell phone service reseller) telling me that my LG G7 does not support VoLTE and my phone will be unable to receive calls in January 2021.
-Using a network info app, the app is telling me it is connected to T-Mobile towers (so I have a Straight Talk T-Mobile compatible SIM)
-I can't find any options to enable VoLTE in settings, and wifi calling is erroring out
I was wondering if there are ways to get VoLTE and Wifi Calling working (Straight Talk supports it, but not my current ROM/SIM).
I can switch to the following sims supported by Straight Talk.
-AT&T Compatible Sim
-Verizon Compatible Sim? If my phone supports CDMA bands
OTHERWISE MOST OF US WILL HAVE A PAPERWEIGHT IN 2021!!!!!!!!!

Same problem
I'm having the same problem. Any progress on this?

I'd like to know this too. Surprised there is no traffic here with all the knowledgeable people on this forum.
G710EAW here. BTW There was an Android 10 update just two hours ago from Android 9. Someone with an 'EM' phone in another thread said VOWifi is "working now" but how do others know if it's working when January 1st comes around?

Falkentyne said:
I'd like to know this too. Surprised there is no traffic here with all the knowledgeable people on this forum.
G710EAW here. BTW There was an Android 10 update just two hours ago from Android 9. Someone with an 'EM' phone in another thread said VOWifi is "working now" but how do others know if it's working when January 1st comes around?
Click to expand...
Click to collapse
If you guys have cross flashed roms, then volte will not work. It doesnt work for any of us who have crossflashed. Whichever model.
You need to be on original software. Looks like some licensing thing that volte requires. They need to provision volte for all the phones. Sounds like they are not interested to provision it for g7. Odd that even EAW model which has original firmware, they sent that mail too....
Sad/Odd to see your carriers are suddenly changing to only Volte.

Is there a way to put it back to original software? I actually don't need it crossflashed to anything because it's a Verizon originally and I would like to use it on that network. Or does it not work that way?

Turnhoo said:
Is there a way to put it back to original software? I actually don't need it crossflashed to anything because it's a Verizon originally and I would like to use it on that network. Or does it not work that way?
Click to expand...
Click to collapse
Main issue is that your carriers dont want to provision volte for your G7s. So no guarantee if cross flashing back to original will work.
There is crossflashing guide in guides section with which you can go back to stock firmware. Do this at your own risk.
In our country we have a volte carrier called Jio. They provide an app called jiocall. Using that app you could use their service even if your phone is not volte capable. You will have to see if there are such apps for your carrier. Thats the only non technical, simpler solution.

I have some information that might make all of you guys happy.
I was told by Safelink Wireless that VOTLE is a function of BOTH the phone *AND* the sim card.
Basically, if the phone itself is VOLTE compatible but the sim card is not, then the phone will be reported on their system as not compatible, and will ask you to upgrade your phone.
However if a VOLTE compatible SIM is inserted, if the phone does in fact support VOLTE, it will then work. That's because it's provisioned on the carrier via the sim card itself.
If you purchased a sim via the "Buy your own sim" package, e.g. online or from Best Buy, etc, awhile ago, then that sim is not compatible. You simply need to call Tracphone/Safelink and ask to buy a VOLTE compatible SIM (which costs 99 cents). Then when you get it, call their tech department to have them transfer the phone service and phone number to the new SIM.
You can dial the phone's service menu and go to the VOLTE/GPRI menu and if the options are there, then the phone supports it.

What's the correct service menu number for our phones?

Falkentyne said:
I have some information that might make all of you guys happy.
I was told by Safelink Wireless that VOTLE is a function of BOTH the phone *AND* the sim card.
Basically, if the phone itself is VOLTE compatible but the sim card is not, then the phone will be reported on their system as not compatible, and will ask you to upgrade your phone.
However if a VOLTE compatible SIM is inserted, if the phone does in fact support VOLTE, it will then work. That's because it's provisioned on the carrier via the sim card itself.
If you purchased a sim via the "Buy your own sim" package, e.g. online or from Best Buy, etc, awhile ago, then that sim is not compatible. You simply need to call Tracphone/Safelink and ask to buy a VOLTE compatible SIM (which costs 99 cents). Then when you get it, call their tech department to have them transfer the phone service and phone number to the new SIM.
You can dial the phone's service menu and go to the VOLTE/GPRI menu and if the options are there, then the phone supports it.
Click to expand...
Click to collapse
Update, I recently bought a new sim and I have VOLTE right now on ULM android 9 latest security fix LG G7 image, running on Straight Talk.

took a while to understand lgup but my 710 oulm had a type oreo that the guy said couldnt be but i crossed flashed it to 10 i dont see the rom anymore and i hope i put it on another drive it was a canadian rom for android 10 works great otherwise im looking to get volte active in the *#*#4636#*#* phone menu you can see "provision for the setting under the radio on off but its a grey area the buttons dont work could be good could be bad its definately part of 10 but ?? grey areas preferred network could be sketchy to play with the phone initially on transition had incredible link up speed now its giving me a pain because assume i played with the connection preferences tab and its a registration error like dum just use the assigned sim guys and stop trying to mac or identify with every device anyway its the registration of a telephone number robo heads

Question Realme Gt Master Edition VoWifi dont work?

Realme Gt Master Edition VoWifi dont work?

gfpeti2 said:
Realme Gt Master Edition VoWifi dont work? PLease help, Thanks !
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Click to collapse
it depend on your sim card carrier

I have been looking for that information, thinking about getting this phone to use T-Mobile USA GSM voLTE? is this phone compatible?

@ryantek No, it's not. I have been using Gt Master in Mint Mobile (which is T-Mobile MVNO) for 6 month and no VoLTE, no VoWifi. I could use mobile data, but even this was not very good, often gets stuck to 3g network, though GT Master supports most of the LTE bands used by T-Mobile (except for B71 600Mhz).
I had two long chats with Mint Mobile customer service, no resolution.
I believe it's gonna be even harder to activate it after July 1st, when T-Mobile will shutdown it's 3G network. Mint Mobile didn't make me any problems to buy and activate service, but now constantly bugs me to replace phone for compatible with their network.
I've also tried it with US Mobile (T-Mobile network), Boost Mobile (ATT) and couple others. The same effect.
Save yourself some trouble and buy phone that's on compatibility list: Oneplus, iPhone, Samsung or Motorola.
I bought Galaxy S22 and now use it as my main device in Google FI. GT Master still have active Mint Mobile simcard until 3rd of June, but after that it will be over.

Hi,
Thank you for sharing all of this information. It is sad to see the carriers in the USA do not support this phone. Sadly I will stay away until anyone can confirm a phone of this brand that works with VoLTE (Tmobile).
Once again Thank you.

ryantek said:
Hi,
Thank you for sharing all of this information. It is sad to see the carriers in the USA do not support this phone. Sadly I will stay away until anyone can confirm a phone of this brand that works with VoLTE (Tmobile).
Once again Thank you.
Click to expand...
Click to collapse
Set up VoLTE and VoWiFi via QPST and the ( advaced pdc tool PDC ) Root is required. This option works in stock. You need to try several "choose" profiles, one will definitely go
In custom rom, if it doesn't work, just back up the EFS partition (after editing in stock rom) and restore it later in custom rom

I see. Wondering is there is a signed ROM with VolLTE enable out of the box.

Today I tried Google Fi simcard with my Realme GT Master (normal not modified ROM) and it worked!! VoLTE is working and so is VoWiFI (I think). I'm not 100% sure about VoWifi. I have icon of VoWifi during call but I can't make call just on WiFi while on Airplane Mode, I have to turn off Airplane Mode or it doesn't allow me to make a call.
Google Fi was activated with Galaxy S22 few months ago.
I'm not gonna test it for long, because I use Galaxy S22 as my main device now and in few days I'll move to US Mobile/Verizon, but Google Fi is usable. I still can't recommend buying GT Master for US: too much hassle, too many unknowns.

nndn said:
Today I tried Google Fi simcard with my Realme GT Master (normal not modified ROM) and it worked!! VoLTE is working and so is VoWiFI (I think). I'm not 100% sure about VoWifi. I have icon of VoWifi during call but I can't make call just on WiFi while on Airplane Mode, I have to turn off Airplane Mode or it doesn't allow me to make a call.
Click to expand...
Click to collapse
so basically you don't know which network you were on while VoLTE started to work? Google FI uses all three networks and switches them dynamically

As far as I know Google Fi uses two networks: Tmobile and Us Cellular. As I'm in western Massachusetts and US Cellular doesn't have coverage here, I'm pretty sure I got connected to T-Mobile. But I can't confirm it with 100% certainty.