You may need to restart your phone for Telia 5G to function on your phone.
In order to activate 5G network support on iPhone 12 models, Apple will offer an automatic device upgrade, Carrier Bundle version 46.1, from 4 June 2021, which must be accepted by the device user. The update may reach different devices at different times. Users should also make sure their phone is running on the operation system iOS 14.5. If your phone is running an older version of software, you will need to update the software first, after which you will be offered the option to add 5G support.
To a certain extent, the process of checking for iPhone 12 Series updates can also be launched manually. To do this, you need to go through the following steps in the phone menu: Settings – General – About and click on Network Provider.