Who is your telecom provider?Hi!
Testing the 12.1-20220815-0804-OFFICIAL still the same problem I reported before, unable to operate on LTE network (4G), max WCDMA H+ (3G). Occasionally mobile data drops, being necessary to deactivate SIM (in use SIM) and reactivate one or more times to reconnect. Check if you need to include anything related to specific countries. I'm in Brazil.