well i recently bought i 8g ifone and it was UNLOCKED< but i did an upgrade and it restored my fone...so now its locked, nd i found a forum where it said to unistall itunes and reinstall it but a lowere version the 7.5 nd i had 7.7, so i did all that but now im receiving and error message "the file "itunes libraray.itl"cannot be read because it was ceated by a newer version of itunes"and itunes wont even come up... does anyone no how to fix this problem...or another way i can unlock my fone...please help!!!!!