My Unlocked AT&T Samsung Galaxy s10 won't update to Andorid 10
I bought an unlocked att samsung galaxy s10+ from ebay. The phone is almost brand new.
My problem is that I cannot update it to the latest version. Everytime I try, it says "Software is up to date" . I am currently running on android 9 and UI version 1.1.
I read a lot about how can I make it to update and seems that the only way is to enter an ATT SIM Card which I don't have and cant get it as I live in Europe.
Is any alternative to fixing my issue?