What a day. Couldn't swap the BYOD Sprint Sim from the unlocked Note 8 into the Note 9 successfully at home (had no issue doing this from home between the Note 8 and an S8 Plus, both unlocked, a couple of times, straight from the Sprint site) - so after the failure at home, thought I could walk into Sprint and have them do it quick. That was NOTthe case. Over an hour later after 5 or 6 failed attempts at it activating on their network and two calls of them calling their main whatever dept, I left. I had been there so long I was late getting my daughter picked up from her vocational program so I wasn't happy with that, plu when I left, they'd moved my original number off the Note 8, it wouldn't activate on NOte 9 even though the phone was showing in my account, so the number was in limbo and i had no phone number for calling, texting any family - husband or kids. After a 2nd failure at attempting to get Sprint online help from home, I said the hell with it, walked into a TMobile store, and asked about the Prepaid service ( can't get postpaid at this time for a few reasons, so Prepaid was the option at the time). The guy got right into it and activated it without a single issue!! Flew threw their screens and didn't really have an explanation as to why Sprint couldn't activate it, other than they were doing something wrong. I figured that myself. lol. So now I'm very happy with how it's doing on the TMobile prepaid network