ok ive been having weak signal when i was jailbroken with blackra1n on 3.1.2 firmware and 5.11.07 basband. a few weeks ago, i had to restore my phone because it got stuck on boot loop. but i had no choice but to upgrade to 3.1.3 with 5.12.01. oh im on att contract by the way. anyways, my phones signal still sucks. when im in areas where the signal is strong and have 3g, my signal bars is at 1 or 2 but on edge. my friends phone which she just got last week from att, had like 4 bars on 3g and she was sitting right next to me. can anyone tell me how and why my signal isnt the same? btw, i never unlocked the phone either cuz i didnt need to.