WiFi calling doesn't work on OP5 with Oreo

[HTC_FUZE]

WiFi calling was working fine with nougat, it doesn't work after I upgraded to Oreo. I have OB4 installed on the phone with T-Mobile USA. I am in remote place without T-Mobile signal. I put Sim card into my Nexus 6, Wi-Fi calling works fine.
So Oneplus team breaks Wi-Fi calling on Oreo?

 

[atistang]

I have TMobile and I'm on OOS 5.0.1, no issues with WiFi calling here.

Occasionally I will have to toggle airplane mode for it to work, but I had that issue before Oreo.

 

[HTC_FUZE]

Still doesn't work on beta 5

 

[usablefawn]

Still doesn't work on beta 5

Have you enabled WiFi calling in the Sim & Network settings?

 

[astracd]

If you are using Magisk v15.3 get module VoEnabler v1.1 created by Toucan.
I did not even seen option in the sim and network until I install this module...

 

[akxak]

I have no problems with US T-Mobile, although it does not work with German T-Mobile. In another thread it was explained that Oneplus and the respective carrier need an agreement to make it work. If your carrier doesn't have one, it will not work.

 

[HTC_FUZE]

I don't have the option in Sim&Network for WiFi calling until I did fresh installation. Now it is working.

 

[strongst]

I have no problems with US T-Mobile, although it does not work with German T-Mobile. In another thread it was explained that Oneplus and the respective carrier need an agreement to make it work. If your carrier doesn't have one, it will not work.

That's true, without the agreement of German T-mobile no volte or vowi won't work. They want you to buy a galaxy s8 for example which is enabled for both...

 

[HTC_FUZE]

It is really strange. WiFi calling option disappear after I switch on the cellular and then switch back to airplane mode.

 

[smohanv]

Still doesn't work on beta 5

If you are using magisk with OB5, flash VoEnabler and it works.

 

[HTC_FUZE]

I know why. The t-mobile sim card must be selected for data.

 

[Pho3nX]

I know why. The t-mobile sim card must be selected for data.

You read answer / reply from other people? You talk alone and don't answer to users try help you. In XDA there a "Thanks" button or "Quote/Multi-Quote", i advise to use that.

 

[HTC_FUZE]

You read answer / reply from other people? You talk alone and don't answer to users try help you. In XDA there a "Thanks" button or "Quote/Multi-Quote", i advise to use that.

I am not talking alone, I am sharing my finding for all people so every one reading the topic can find the clues if they faces similar problem.

 

[crackers8199]

I have TMobile and I'm on OOS 5.0.1, no issues with WiFi calling here.

Occasionally I will have to toggle airplane mode for it to work, but I had that issue before Oreo.

i know this is a crazy old thread, but have you ever been able to fix this? i'm still having this issue even after ditching OOS and going to a custom ROM. this has to be a bug in the modem firmware, but i've reported it to OP and they seem uninterested in fixing it...

 

[atistang]

i know this is a crazy old thread, but have you ever been able to fix this? i'm still having this issue even after ditching OOS and going to a custom ROM. this has to be a bug in the modem firmware, but i've reported it to OP and they seem uninterested in fixing it...

Nope. I even installed enterprise networking equipment in my home since and it seems to be better (probably placebo). I have also done a factory reset which didn't help.

It seems like I can always receive a call, but can only make a call 75% of the time. There has been times where I tried to call people I know several times when it was acting up, then I would message them telling them to call me and my phone rings minutes later.

What usually works (but not always) is to reboot the phone, then turn airplane mode on, wait a few minutes, then turn it back off.

 

[crackers8199]

Nope. I even installed enterprise networking equipment in my home since and it seems to be better (probably placebo). I have also done a factory reset which didn't help.

It seems like I can always receive a call, but can only make a call 75% of the time. There has been times where I tried to call people I know several times when it was acting up, then I would message them telling them to call me and my phone rings minutes later.

What usually works (but not always) is to reboot the phone, then turn airplane mode on, wait a few minutes, then turn it back off.

that may be a different issue then...mine always works when it's turned on, but seems to just stop working randomly for no reason. the vowifi and volte icons disappear, and the only way to get them back (and get it working again) is to toggle airplane mode or reboot the phone...

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