i hope someone can help me, i'm desperate now. a couple of months back i upgrade my 2g iphone to from firmware 2.0 to 2.2 and everything went smooth. i was so happy with my jailbroken/unlocked iphone. a couple of days ago it went crazy, all of a sudden it crashed and the new apple logo appeared and stuck there like forever until i hard reset the phone. after few hard reset i manage to use the phone again but it kept on doing the same thing, over and over again, crashed and reboot, stuck and hard reset. after few tries at hard resetting it, the restore screen appeared (itunes logo and usb cable), it totally failed to restart to normal.
long story short, i tried restoring it and jailbreak it again (both using backup from itunes and as a new iphone, also in DFU mode and normal restore), now the phone keeps on crashing when i try to use applications and sometimes in the middle of calls. i'm at a lost now, got the iphone around 6 months ago. i can't see the reason why and i'm asking for help, help!!
thanks bhz1, no i'm not using any of those apps and i'm not on contract carrier. the first upgrade i used a custom firmware (not using quickpwn at all), that one went well for a couple of months until few days ago. then i tried using a different firmware + quickpwn but i got the same problem. have been trying so many times..sometimes it crashes in the middle of restoring and i got error (9)..