Develop Bugs

Question for AT&T LTE users

So I get LTE but as soon as I get on a call signal goes to H and I cant use data/apps while on the call. Am I using the wrong APN settings, or wrong radio maybe? Any settings help would be great, or if you can confirm also. Thanks.

Mine nexus 6 did same thing. I'm not sure that the data still work or not but everytime I on call I see LTE Icon change to H like you said

It's one of 2 things.
Either VoLTE is not turned on on your device
Or ATT does not support VoLTE in your area.
First one is fixable. Second one is not.
Sent from my MI 5 using Tapatalk

TheDriller said:
It's one of 2 things.
Either VoLTE is not turned on on your device
Or ATT does not support VoLTE in your area.
First one is fixable. Second one is not.
Sent from my MI 5 using Tapatalk
Click to expand...
Click to collapse
AT&T doesn't support VoLTE on any phones that aren't sold by them.

StykerB said:
AT&T doesn't support VoLTE on any phones that aren't sold by them.
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Click to collapse
Then that would explain that I would think

LTE is data only, so when u go on a voice call it will got to hsdpa or 3g bc that is voice and data, so it is normal

Bradl79 said:
LTE is data only, so when u go on a voice call it will got to hsdpa or 3g bc that is voice and data, so it is normal
Click to expand...
Click to collapse
Please don't spread information that's no longer the 100% truth. AT&T, Verizon, and (for a while now) T-Mobile offer calling over their LTE network, dubbed VoLTE (Voice over LTE). It allows voice packets to travel over the LTE network instead of legacy/3G and older networks.
The way the standard it set up, devices made more recently have software and hardware support for it, but as carriers have certification processes for their network, not all devices work cross-carrier. Most notably, iPhones (bleh) work cross-carrier because of the way their network configuration is provisioned (device identifies what network it's on, and downloads carrier configuration for that particular network). Some Android devices work cross-carrier (Nexus 6P and 5X), but the manufacturers of Android devices designing unlocked devices for some reason aren't certifying on AT&T, maybe because of cost or complexity.
Therefore, there are 3 main reasons VoLTE won't work on a device:
1) Not in a VoLTE area
2) VoLTE not enabled (this could encompass the option simply being disabled per the user)
3) VoLTE being restricted (AT&T restricting access because the device isn't certified, and/or the device not being capable)
Read up more on the requirements for AT&T (specifically) here:
http://att.com/hdvoice

balleron24z said:
Please don't spread information that's no longer the 100% truth. AT&T, Verizon, and (for a while now) T-Mobile offer calling over their LTE network, dubbed VoLTE (Voice over LTE). It allows voice packets to travel over the LTE network instead of legacy/3G and older networks.
The way the standard it set up, devices made more recently have software and hardware support for it, but as carriers have certification processes for their network, not all devices work cross-carrier. Most notably, iPhones (bleh) work cross-carrier because of the way their network configuration is provisioned (device identifies what network it's on, and downloads carrier configuration for that particular network). Some Android devices work cross-carrier (Nexus 6P and 5X), but the manufacturers of Android devices designing unlocked devices for some reason aren't certifying on AT&T, maybe because of cost or complexity.
Therefore, there are 3 main reasons VoLTE won't work on a device:
1) Not in a VoLTE area
2) VoLTE not enabled (this could encompass the option simply being disabled per the user)
3) VoLTE being restricted (AT&T restricting access because the device isn't certified, and/or the device not being capable)
Read up more on the requirements for AT&T (specifically) here:
http://att.com/hdvoice
Click to expand...
Click to collapse
So how do you enable on the OP3 with AT&T?

SysAdmNj said:
So how do you enable on the OP3 with AT&T?
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Click to collapse
You can't, only thing that would remotely make it work is if your imei was set up as a HDVoice supported phone in AT&T's system (s6, s7, note 5, note 7, iphone, etc). Though that likely won't work either since it'll try to provision the VoLTE and fail and yea.

AT&T does not use "Standard" VoLTE, so even if the phone supports it (like the OP3 does) and they were to allow the IMEI, it still wouldn't work. Phones have to have specific code from AT&T to do their HDVoice (according to their own customer service postings in their forums)

How to enable VoLTE on Pixel?

Hi guys.
Let me elaborate my question.
1. I am totally aware that VoLTE on Android at the moment generally requires the handset to be from the carrier, or from the same region as the carrier for it to have the correct VoLTE (and VoWIFI) settings.
2. I am also totally aware that since Android 6.0, there actually has been a provision to allow carriers to send carrier settings to the user. I also know that this isnt being widely used.
After my ownership of my Pixel XL, I moved to a HTC U11, which I have flashed a custom ROM. This custom ROM managed to have the carrier settings for VoLTE for my carrier baked in.
I am keen on getting a Pixel XL2, so Im keen to see what the Pixel community is doing to enable VoLTE on networks that arent stocking the Pixel or Pixel XL.
Here in Australia, both generations of the pixel seem like they will be Telstra exclusives. and I am not inclined to go on their network!
Thanks for any assistance!

I use it with T-Mobile, only Verizon stocks it in the States. Volte works fine for me. Nothing i needed to do other than to setup the phone with the Sim card in the device.

Same here, got it with my T-Mobile SIM card.

This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit

I'm on Oreo 8.1 on my P2 XL, looks like it's already enabled. I'm on AT&T.
View attachment 4317129

Change carrier. AFAIK you'll never get enhanced LTE services using a non-AT&T branded phone on their network. Once I switched my pixel xl to T-Mobile things like that and wifi calling worked fine.

My condolences to your Pixel XL 2. I was in a Verizon store the other day just to check out PXL2. The blue tint when turning the phone horizontally - horrific. Also, barely faster than my Pixel XL, even if you care for that kind of thing (speed.)

CHANGiism said:
This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit
Click to expand...
Click to collapse
Same problem in Argentina, Pixel is NOT SOLD here so.... out of luck, but I tried this (already knew of the menu) and all my options are blacked out -can't enable any of them-, advice?????
Thanks.

If you can get root on your phone, flash magisk and there is a module in there to install that can enable VoLte and Wifi calling, worked for me on AT&T.

loeffler23 said:
If you can get root on your phone, flash magisk and there is a module in there to install that can enable VoLte and Wifi calling, worked for me on AT&T.
Click to expand...
Click to collapse
I need to try this when I get home. I get nowhere with ATT

LubbocksFall said:
I need to try this when I get home. I get nowhere with ATT
Click to expand...
Click to collapse
the module only changes the settings to allow for toggling but does not provide needed ims libraries.

CHANGiism said:
This worked for me. Go to dialer and dial
*#*#4636#*#*
Phone Information
Turn on VoLTE
Turn on Video Calling
Turn on Wi-Fi Calling
Exit
Click to expand...
Click to collapse
I had to toggle VoLTE off then on, restart. It's working for me now

"Turn on Video Calling"
Option is disabled, couldn't turn on

Depends if you're on Verizon or straight talk or what. I'm on straight talk and they don't offer VOLTE even though they use Verizon towers.

Using *#*#4636#*#*, the VoLTE provisioned option is greyd out. Anyone has a solution for this?

HSOC said:
Using *#*#4636#*#*, the VoLTE provisioned option is greyd out. Anyone has a solution for this?
Click to expand...
Click to collapse
It means your operator is not offering VoLTE, or, as in my case, Pixel XL is not approved by the operator. I have VoLTE on my SIM enabled and working with operator approved devices but network rejects Pixel as not compatible one.

ylapas said:
It means your operator is not offering VoLTE, or, as in my case, Pixel XL is not approved by the operator. I have VoLTE on my SIM enabled and working with operator approved devices but network rejects Pixel as not compatible one.
Click to expand...
Click to collapse
Operator offers VoLTE and it doesn't filter IMEI like in some cases. Other not approved devices (e.g xiaomi, oneplus) managed to enable volte via shortcuts. I am asking for a similar workaround. --thanks

Of you're on Straight Talk you're SOL. They don't offer it even if you're using a Verizon SIM

If you had geryed provisioning options you need to use magisks voenabler. a did it right now on december pie update. Now I have all enabled. Just waiting for operator to enable volte for my number. I wonder it will active.

Hi, my carrier does support VoLTE but the Pixel is not on its whitelist.
When dialing *#*#4636#*#* and going into phone info, the switches for "VoLTE Provisioned" is off and greyed out, but at the top of this screen I see "Voice Network Type: LTE". Does that mean I am getting VoLTE? I cannot see any other sign or symbol when calling. (I know some devices have a VoLTE symbol either in the status bar or during a call)

AT&T VoLTE is possible. Just got it turned on

I was finally able to get AT&T to get my VoLTE turned on. It took two chat sessions but finally I got them to turn it on.
VoWiFi... not so much. They wanted me to go in to a store, because the phone isn't an AT&T sold phone. The chat representative said they would do something to the phone to turn it on even if the VoWiFi switch is already turned on.
Side Note for VoLTE:
My suggestion is tell them you used the dial code "*#*#4636#*#*" and tell them you can see that the VoLTE isn't enabled. And if your phone isn't registering with the IMS info, let them know too.
Good Luck
Anyway here are the screen shots:

You sir are a saint, thank you so much for this helpful information.

That dial code doesn't do anything when I type it in for some reason.

I was able to get VoLTE on both mine and my wife's OP8 Pro by just having the phone agent register the IMEI and rebooting.
I have submitted a ticket with their advanced team for enabling 5G provisioning since we have the 5G bands (or at least one of them) for AT&T. I will follow up if I am successful.

yeah I came from the Note 10 5g on ATT and i didn`t have to do anything, I just put in my sim and turn on VOLTE and it just worked. but Vowifi is another story. lol, I`m going back to Tmobile in couple of months, at least they allow vowifi and 5g to work without the BS from ATT

Will be trying myself and will post if make any progress

I ended up with a MVNO provider Ultra Mobile as a 2nd line on SIM2 (need a 2nd line for work anyway). That gives me 5G+VoLTE+VoWiFi unlike AT&T.
really wish AT&T business practices change. It sucks that AT&T does their customer like that.

I have enabled Volte via PDC method, disabled overseas commercial and activated CU-LTE.
Everything works great.
Japan Rakuten/AU Mobile

Is the Redmi 7 VoLte compatible?

Does anyone know if the Redmi 7 is VoLte compatible on T-Mobile or ATT? I went and checked with the imei on T-mobile's website, and it told me the Redmi 7 is not, and will stop working on the network soon.
Under my T-mobile sim card settings the Use VolTe switch is switched on. Checking it with the “Network Mode Universal” app from the Google Play Store as recommended here:
https://www.xda-developers.com/t-mobile-att-require-volte-phone-calls-shut-down-3g/
shows UMTS as voice network, instead of LTE, meaning it may soon be obsolete. Wish I had known this when I bought it.

General For USA Users: I am getting wifi calling on an AT&T MVNO using the Note 9T

I thought I should mention that without rooting or any other hacks besides disabling carrier checking for Volte and VOwifi by entering the usual codes, I am actually getting wifi calling on FreeUP, an AT&T MVNO. Which probably means ATT and all its MVNOs get wifi calling on this model.
So far as I knew until now, ATT blacklists phones that it doesn't sell from using this particular calling feature. ( apart from iphones and Pixels bought directly from Google, because both of those manufacturers refused to let AT&T sell their phones otherwise).
I couldn't do wifi calling on any of my other Xiaomi phones (Mi Max 3, a Mi Max 2 and a Redmi Note 5 Whyred, all rooted), although I could get Volte to work using the shortcode for it. But wifi calling was supposedly blocked from the carrier's end and couldn't be enabled.
I expected to get the usual "no network" message when I tested wifi calling on the Note 9t by turning on airplane mode, then turning on wifi, but it just put the calls through.
(you could always get T-Mobile wifi calling to work on some Xiaomi phones, but TMO sometimes other had incompatibilities).
fyi, the codes, in case anyone reading this is new to Xiaomi:
Code to enable Volte: Dial * # * # 86583 # * # * using the default dialer -- the message has to say volte carrier check disabled for Volte to be enabled.
Code for Wifi calling: *#*#869434#*#* -- the message says says vowifi carrier check disabled for wifi calling to be enabled.
(but check the settings after using the codes because sometimes you still have to toggle them both on)
PS: This model is a pretty decent option for US buyers on a strict budget, as is the Poco M3 Pro.
The next step up if you need North American bands is the Mi 11 lite (about $100 more) and the Poco F3 ($150 more).