I have a 3GS which i jailbroke with Greenpo1son on 4.2.1. My sleep button has been messed up so i got rogers to send me another one under warranty. I tried to reset all my settings and delete all my files via settings/General/etc. After that my phone went black, reset and is now stuck in a boot loop. It shows the apple logo switches to the Greenpo1son one then freezes. It stays like that for about 10 min. then resets and same thing. I've tried leaving it hooked up to my computer hoping for it to be put into recovery mode but nothing. I tried iRecovery but Libusb messed up my comp lol as I have USB keyboard and mouse. Please help me ASAP i don;t wanna have to pay the $800 fee rogers is gonna charge me if I cant fix this
Have you tried manually putting it into recovery mode to restore?
While the phone is on, hold home and power until it turns off and comes back on, when you see the Apple logo, release power and hold home until you see the iTunes+USB screen.
No sleep button huh. Ok, let the phone die so it is off. Then hold the home button while you are plugging it in, keep holding it until you see the recovery logo.
This isn't a safe way to do things but I've done it. Get limera1n. Run it on your iPhone, it will set it into recovery mode. When it finishes that part just close off limera1n and proceed to open iTunes to see if it recognizes.
I don't know if you tried recboot yet but that might work too. But i have had trouble with it before that's why I resolved to using limera1n.
If either of these work, would a restore in iTunes erase everything so that Apple or Rogers cant see my phone was jailbroken? or would i have to do it in the settings and reset back to factory settings?