I have a blackberry 9530 from the USA but i live in poland. I have the simlock took off. I never upgraded it and i wonder if i do can i mess up something cuz im not using verizon anymore but another provider called Orange. Last time i tried to speed it up doing all this http://www.youtube.com/profile?user=...43/3sUVY6nPN58 and now i cant send text msg's. I can receive'em tak calls and call but cant send sms. I dont have internet either but i think its cuz Orange doesnt sell the blackberry 9530 in polad still (Telefony komórkowe Orange - abonament, mix, karta i internet - those are the only BB being soled in poland) So i wanna ask u if i can upgarde it safely and to what kinda OS ?