Quote:
Originally Posted by Itshim
Just looked no option , open SIM card ,
have SIM name ,
SIM number ,
data roaming ( is that it different name ?)
Preferred network type, were I set it to 4g/3g/2g
access point ,
names operator that's it  |
According to that link if you have followed it exactly you may need to perform the simple update on your phone, it may also mean your version of phone may not support it.
What if the Wi-Fi Calling feature won't turn on
Perform the following methods if you can't enable the Wi-Fi Calling feature of your OPPO A74 5G.
Update the phone software
Go to [Settings] > [Software updates] / [System updates] or [Settings] > [About phone] / [About device] and update your phone to the latest software version.
Go to your OPPO A74 5G's [Settings].
Tap on the [Mobile Network] / [Dual SIM & Cellular] / [Dual SIM & Mobile Network] / [SIM Card & Mobile Data].
Select the SIM card you want to modify.
Tap on [Wi-Fi Calling].