Hi guys..I was planing to upgrade friends S3 on newer Android version..He is running 4.1.1..And when i click check update i get error..Something like it can't be upgraded because Phone is touched or it's not that phone..He bought it in T-Mobile (croatia)..Can you post me a link for flashing it or restoring a backup (just like on our One X)..Because I can't find anything here sry