I just got my 32g iPhone 4 about 2 weeks ago. After jailbraking the phone, I noticed a couple of things. 1st: when the iPhone reboots I noticed a little thin LCD light showing through. 2nd: I noticed after jailbraking, I could not sign on to Facebook using app sign on. 3rd: when restoring to factory setting prior to visiting genius bar, my phone got stuck and froze up on apple logo indefinitely. Lucky for me, the tec at apple was cool and exchange it for a brand new one. Warranty is void on any jailbroken iPhones. After all that trouble, I dont think I'll jailbrake this one it's not worth it.