It is the very first thing you should check. If there is an issue on the Microsoft end, you can’t do anything to fix it. Instead of wasting time on all the subsequent solutions, it is recommended to ...

Needless to say, a “mobile network not available” message — or some alternative version of it — is a major problem on a smartphone, since the whole point is to make calls and access the internet away ...

The process is free, easy to set up, and doesn't use mobile data while helping you avoid upgrading to a mesh network.