As per the subject line.
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@elucidate Not yet. Wifi and 4G Calling explained | O2
Wifi and 4G Calling is currently available on the following devices:
*On some Android devices, Wifi and 4G Calling will only work if you’re using O2 firmware. That’s essentially the software that makes your device turn on and run. Sometimes there are different versions of firmware for the same device.
I DO NOT WORK FOR O2
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Track usage, upgrade and get support with the My O2 app