Wifi and 4G Calling

[Chris250]

Will a xiaomi Mi 3 5g phone got from xiaomi UK work with 02 wifi calling and 4g calling if I got a sim only deal

[Bambino · Accepted solution]

@Chris250  I believe WiFi calling is enabled for your phone. You can check here: https://www.o2.co.uk/connectivity/wifi-and-4g-calling

[PhoneChanger]

Ensure you have it turned on it your account also, as if your phone supports it but you don't have it enabled it won't be used.

[HellDiverUK]

4G calling and WiFi calling work on pretty much all Xiaomi phones, just needs a code typed in to disable carrier checking.  Had it working on both a Mi9T and Mi8 Pro.

[Briz]

I was struggling with this on Mi 9 Lite, solved it by typing the following into the phone dialer:

VoWiFi *#*#869434#*#*
VoLTE *#*#86583#*#*

These disable the carrier check and then the options to turn on VoWiFi and VoLTE become available in the SIM card setting.