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Wifi and 4G Calling

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

I DO NOT WORK FOR O2



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

I DO NOT WORK FOR O2



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PhoneChanger
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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.
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HellDiverUK
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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.

OnePlus 8 Pro 8/256GB Grey, Huawei Nova5T 6/128GB Blue, iPhone XS Max 256GB Grey
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Briz
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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.

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