Need help gettin new rom/ATT WiFI Calling to work on unlocked phone - Samsung Galaxy S9+ Questions & Answers

Hi all,
I have an S9+ unlocked and I am trying to get WiFi calling to work. I've tried a few different roms but no dice. I called ATT and they did what they could on their end but they couldn't get it working and escalated the ticket. I told them I was using an ATT branded phone. Any help would be greatly appreciated.
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Is it an att phone that was unlocked or is it a factory unlocked phone???
If its factory unlocked you are out of luck.

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daltrondown said:
Hi all,
I have an S9+ unlocked and I am trying to get WiFi calling to work. I've tried a few different roms but no dice. I called ATT and they did what they could on their end but they couldn't get it working and escalated the ticket. I told them I was using an ATT branded phone. Any help would be greatly appreciated.
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As Thor said, if you bought it from anywhere other than ATT, your out of luck. They only allow phones purchased through them to use Volte and Wifi Calling.
The one workaround is to activate the features on your line by using a different phone, and then swapping the sim to your S9/S9+. It's a trick that has worked for some but no telling if it still works.

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Thanks fellas!
I still have my old ATT S7 Edge that WiFi calling worked on, so today or tomorrow I'm going to flash the S9+ to this, then put the sim card in the S7 Edge, use WiFi calling, then put it in the S9+ and see if that works. I appreciate the tips!

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daltrondown said:
Thanks fellas!
I still have my old ATT S7 Edge that WiFi calling worked on, so today or tomorrow I'm going to flash the S9+ to this, then put the sim card in the S7 Edge, use WiFi calling, then put it in the S9+ and see if that works. I appreciate the tips!
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Rumour is it wont stat working more then a week.

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Thor2j said:
Rumour is it wont stat working more then a week.
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IT won't work until a week has passed or it will only work for a week?

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daltrondown said:
IT won't work until a week has passed or it will only work for a week?
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It wont work beyond a week. Att queries the phone ever so often and when it does it will stop working. This is what I've read and been told. It used to work when it first came out for longer for some reason and now is down to a day to a week.