Originally Posted by IHAVEAQUESTION
Is your jailbroken and unlocked?
Mine is running 3.1.3 as well. It's slow but I attribute the problem to mine being JB and unlocked.
It also sucks that most apps required iOS4 or above.
I upgraded to the 4S 14 month ago so it has been off all that time. Just turned it on again because I need another phone to do GSM voice calls and SMS.
Do not mind that no apps will work on it. The thing stutters by mere navigating the GUI.