So I received my phone not too long ago and I had to install lineage OS 21 to fix the keyboard problem AZERTY phones have (as documented by @zegoo here : https://community.fxtec.com/topic/4113-problem-shift-key-with-android-azerty/?do=findComment&comment=69357), and when I put my sim card in (bouygues telecom) everything works fine EXCEPT mobile data.
I can make calls,
I've checked the APN and everything is fine,
I just can't use mobile data.
Anybody have an idea of things that I could check ?