I bought a unlocked refurbished S10+ phone in Canada that was AT&T branded. When I check for updates, it says my phone is up to date but I am on Android 9 and there should be a new version with Android 10. I haven't received any new updates and my security patch level is August 1, 2019.
I am using a Canadian provider Fido SIM. I have tried using the Samsung Smart Switch on Windows 10 and it also says that my phone is up to date.
How do I upgrade my phone and receive OTA updates without having to be connected to AT&Ts network?
Help would be greatly appreciated as it apears my brand new phone will never get any updates ever.