Upgrade to beta (or try to change dialer app. if this works, reset apn settings and remove and insert simcard after wiping cache in teamwin)
Sent from my M2007J3SG using Tapatalk
Nope, yes it could always help but it's not mandatory. A wipe cache it's a good attempt, but u beed twrp, and also NEVER touch "persist"
Sent from my M2007J3SG using Tapatalk
That freeze is a bug that still needs to be fixed (hope soon). Wait 30s without touching it and see. Are u using mi launcher or others? It could cause a conflict
Sent from my M2007J3SG using Tapatalk