OEM is NOT locked. No problems there. I purchased this phone unlocked from Best Buy. Immediately put grapheneOS on it without signing into anything. Connected through Google Fi & Verizon without any issues while on GrapheneOS. Was able to go back and forth on the services without an issue.
Yesterday, I put stockOS on it, now I can’t connect to Verizon. T-Mobile and GoogleFi customer service are sending me back and forth.
I look up the IMEI online and nothing says it’s locked to carrier.
I’m honestly just gonna cut my losses and trade it in to Verizon, but I was curious if I created this problem myself by improperly putting back stockOS, or is it all on the carriers?