I recently upgraded my phone to the most recent build(1.181005.276) After doing so, and restarting my phone, my sim card has just stopped working. The 'Essential Telephony' says that my sim card is invalid. T-Mobile is my service provider if that helps, and if anyone can help me I would appreciate it a ton!
Edit: if possible, I would like a solution that does not have me wiping any data off my phone. Haven't tried a factory reset yet but looks like I might have to. Edit again: Decided to factory reset, regret it because it changed nothing. Tried to rollback onto the previous update, got stuck on the 'flashall.bat' part.. It just was stuck on the nvdef file.