Wifi Calling on AT&T? - Xperia Z3 Q&A, Help & Troubleshooting

Is it possible to enable wifi calling on a unlocked D6603 that has an AT&T sim inside and already downloaded the network settings?

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4G calling and wifi calling not present

I have a HTC u11 coming from O2 but now sim unlocked. I use it with my EE sim but I can't find a way to have 4g calling and Wi-Fi calling.
Someone could help?
EE support says that 4g calling is enabled on my line.
Looking in settings under call there is no option to enable wifi calling and as well when I make a normal mobile call the phone goes in "H"
Thank you for your help
Apn settings?. Settings>mobile data>access point names>
Beamed in by telepathy.
Haven't you asked this question already? I imagine you are on O2 firmware so it won't work. Did you enable it in the phone settings

activate VoLte on unrooted device

Is there any possibility I can get the volte setting to show up on an unrooted European dual SIM model?
Via adb for example?
Call settings, scroll down to the bottom and allow Internet calling for all calls. Keep your data active and when you make a call on 4g it will switch if the network is capable. Be aware that it can munch through your data plan!.
Beamed in by telepathy
That is exactly the problem.. there isn't such an option.. this only is there with the Single Sim Variant. Dual Sim Variant doesn't show it..
Sorry for bump this old thread but I have the same model and issue.
I have a HTC u11 European dual simm, I don't have this option in my menu, my carrier (Vodafone ES) have a VoLTE but I can't work with VoLTE.
I don't have root the phone.
If in cal, I type *#*#4636#*#* appears the option VoLTE but I can't change this option for enable.
Its possible enabled VoLTE in unrooted phone and in the dual simm version?
Thanks and regards.

Dual SIM VoLTE Verizon and Fi

Hi all,
Here is my situation and problem. I have 2 Sims:
SIM 1: Google Fi - my personal number, I want to use it for phone calls only even though it has a small data lan
SIM 2: Verizon - work sim, I want all the data to go through here.
My setting is phone call sim 1 and data Sim 2.
When I make a phone call via SIM1, I lost LTE on my SIM2.
I did call Verizon to get the CDMA LESS feature turned on.
If I were to change the setting to phone call and data through the same sim, then VoLTE works just fine. So I think this is an issue with the phone itself/settings.
Thoughts?
thetangstr said:
Hi all,
Here is my situation and problem. I have 2 Sims:
SIM 1: Google Fi - my personal number, I want to use it for phone calls only even though it has a small data lan
SIM 2: Verizon - work sim, I want all the data to go through here.
My setting is phone call sim 1 and data Sim 2.
When I make a phone call via SIM1, I lost LTE on my SIM2.
I did call Verizon to get the CDMA LESS feature turned on.
If I were to change the setting to phone call and data through the same sim, then VoLTE works just fine. So I think this is an issue with the phone itself/settings.
Thoughts?
Click to expand...
Click to collapse
You need to go into settings "SIM & network settings".
Select "Dual 4G networks".
I don't have your issue.
tech_head said:
You need to go into settings "SIM & network settings".
Select "Dual 4G networks".
I don't have your issue.
Click to expand...
Click to collapse
I do have this enabled...Didn't help
thetangstr said:
Hi all,
Here is my situation and problem. I have 2 Sims:
SIM 1: Google Fi - my personal number, I want to use it for phone calls only even though it has a small data lan
SIM 2: Verizon - work sim, I want all the data to go through here.
My setting is phone call sim 1 and data Sim 2.
When I make a phone call via SIM1, I lost LTE on my SIM2.
I did call Verizon to get the CDMA LESS feature turned on.
If I were to change the setting to phone call and data through the same sim, then VoLTE works just fine. So I think this is an issue with the phone itself/settings.
Thoughts?
Click to expand...
Click to collapse
I have a similar problem. Voice on SIM1 data on SIM2 different carriers. Receive calls and text OK answering won't work. Roaming in Europe. Worked OK prior to recent update. Same setup works on Samsung S10e
Tom Hardy said:
I have a similar problem. Voice on SIM1 data on SIM2 different carriers. Receive calls and text OK answering won't work. Roaming in Europe. Worked OK prior to recent update. Same setup works on Samsung S10e
Click to expand...
Click to collapse
Can't believe there are so few of us having this issue. Why would the LTE turn off when I'm not even using that sim?
Probably many are using just a single SIM.
Have you tried switching the sims in the slots?
Sent from my SM-T830 using Tapatalk
tcfiero said:
Have you tried switching the sims in the slots?
Sent from my SM-T830 using Tapatalk
Click to expand...
Click to collapse
I have no help. In January Mint had an issue where their SIM had to be in slot 1. So I flipped SIMs. Truphone won't work either.

Wifi calling

First I will tell about my environment:
Phone: Nexus 5x
OS: Android 8.1.0
Not rooted
Network Operator: Telia (Sweden)
There is different of version where I can found the Wifi calling button. But I cannot find it. So why is
not available:
1: Wifi calling is not available in android.
2: The Sim card from the operator do not support Wifi calling.
I have asked the operator about this and they said all their simcard has Wifi calling.
So my question. How to get Wifi calling working

no volte option

I got the phone today, but I there is no volte option in setting. I had volte options in my oneplus 5t. Is there secret codes to force unable the option? I am on three UK sim.
Other way round for me.
On BT Mobile (and EE) UK I could never get 4G calling on my old XZ2. Xperia5 II plugged in sim and it was a notifications bar quick button and available in settings straight away.
Comes under:
Settings -> Network & Internet -> Mobile > Advanced > Calling
I have made few calls and it seem they were made over 4G because status bar icon didn't change from 4G to 3G so I guess I do have VOLTE enabled but I don't have option in setting.
Further more I checked the info section and the volte provision option is enabled and grayed out. I don't understand why I don't have option for volte but it works for don't care much about it now.
Edit = WiFi calling option is available in setting and it works too.
I have 4G Calling option available for my O2 sim and VoLTE for my Telekom sim. WiFi calling option is also there.
I only get VOLTE option on my UK 3 sim. On my Spanish O2 SIM it's not available (though I know for sure the service is enabled but only for certain devices)
enekomh said:
I only get VOLTE option on my UK 3 sim. On my Spanish O2 SIM it's not available (though I know for sure the service is enabled but only for certain devices)
Click to expand...
Click to collapse
Weird, I am using UK 3 SIM as well and I don't get option for volte but I am able to make calls over 4G. Don't know why is option hidden.
It is activated by standard if technically possible. There is no reason to deactivate it, so no switch is needed.
VoLTE/ Wifi calling are enabled by the operator. Maybe your operator has not certified Xperia 5 ii yet.
Check with your operator
4G Calling is actually VoLTE, so you have it and you are using it already as you stated above. No worries! ?
rideti.me said:
Other way round for me.
On BT Mobile (and EE) UK I could never get 4G calling on my old XZ2. Xperia5 II plugged in sim and it was a notifications bar quick button and available in settings straight away.
Comes under:
Settings -> Network & Internet -> Mobile > Advanced > Calling
Click to expand...
Click to collapse
Hi. I asked in another thread about WiFi calling working for the Xperia 5 II on BT Mobile. If 4G calling works then hopefully WiFi calling too?.
Can you confirm? Thx.
wazzaworld said:
Hi. I asked in another thread about WiFi calling working for the Xperia 5 II on BT Mobile. If 4G calling works then hopefully WiFi calling too?.
Can you confirm? Thx.
Click to expand...
Click to collapse
I should have clarified my previous post. The selectable option (quick button and menu) is to turn Wifi Calling on/off. VOLTE/4G calling is just fixed as provisioned. You can see this in the service menu (*#*#4636#*#*)
The service providers are clueless when you ask if they do or don't support Wifi/VOLTE calling.
So yes both available and working on BT Mobile.
rideti.me said:
So yes both available and working on BT Mobile.
Click to expand...
Click to collapse
That's awesome thank you. You might have just swung a sale for Sony. You should be on commission :laugh:.

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