VoLTE SIM is working on OnePlus 11 5G
I was among the OnePlus owners, concerned about migrating to VoLTE due to the lack of formal approval of OnePlus devices from Fizz.
Today I changed my old SIM to a VoLTE SIM, and it looks like it's working fine. At least I passed the #8378 test, and the phone shows a VoLTE connection. My device info is in screenshots.
Hope it helps. 
Answers
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@Andrey S. #3835 said:
I was among the OnePlus owners, concerned about migrating to VoLTE due to the lack of formal approval of OnePlus devices from Fizz.
Today I changed my old SIM to a VoLTE SIM, and it looks like it's working fine. At least I passed the #8378 test, and the phone shows a VoLTE connection. My device info is in screenshots.
Hope it helps.Very good news for you!
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Nice, good news
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Nice! I was looking into buying a OnePlus, and I think it's going to happen.
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Good news !
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Nice, work but not officially.No One Plus on the list.
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Do one more test you to be sure: disable WiFi, enable mobile data and call someone. If your connection remains on LTE or 4G you should be good. If it shows 3G, your phone is not supporting VoLTE.
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@G225 code IRSGE said:
Nice, work but not officially.No One Plus on the list.In my opinion, Fizz seems reluctant to officially include OnePlus devices in their phone list to promote their own products, yet they do quietly support devices that natively support VoLTE
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@Andrei_ref_R7VK1 said:
Do one more test you to be sure: disable WiFi, enable mobile data and call someone. If your connection remains on LTE or 4G you should be good. If it shows 3G, your phone is not supporting VoLTE.It shows voLTE during the calls even with disabled Wifi
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@Andrey S. #3835 said:
@Andrei_ref_R7VK1 said:
Do one more test you to be sure: disable WiFi, enable mobile data and call someone. If your connection remains on LTE or 4G you should be good. If it shows 3G, your phone is not supporting VoLTE.It shows voLTE during the calls even with disabled Wifi
This means that everything is fine 🎉
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