I recently purchased a used jailbroken/unlocked 3g iphone with cydia on it. The phone is "very slow" and sometimes "freezes" i have tried to contact the seller for questions, with not responses. I guess he bailed out after receiving the money. I was wondering, does anyone have any idea how to tweak the settings to make my phone faster? Which are the mandatory cydia apps and which ones can i delete to increase memory for faster performance? P.s. The version is 4.0.1 (8a306). Modem firmware 05.13.04 is there a recent overall update out there without me messing with the jailbreak? Thanks a lot guys!!!