3GS acting up

[Millz1029]

Ok so I restored my 3GS to 4.1 firmware and now when I try to jailbreak it or restore I shuts off the comes back on.in other words I can't restore or jailbreak it!more detail I put my 3GS in dfu mode try to jailbreak withe redsn0w it does stage 1 2 but when it says waiting for reboot it just shuts off then back on no jailbreak takes place. Anyyone who can me.

[Heist]

Check AppleHacker & my Method in this thread.
Post #15 & 17
Tried to Upgrade my JB'd 3GS Running 4.1 to 4.3.3 Today - Help Requested - SiNfuL iPhone

One of them should get you back up and running.

[romanb14]

I also had this problem yesterday. Had 5.0.1 on my iphone 3gs, with ipad baseband. When I tried to downgrade to 4.2.1, at about 75% phone restarted, went into recovery loop.

Solution: the solution i found was from somewhere in this forum. While being in recovery loop, put your phone into DFU mode and use tinyumbrella to ~fix recovery~. Worked like a charm for me. Rebooted into perfectly installed and jailbroken 4.2.1.

Further info> to downgrade I used snowbreeze to make a signed 4.2.1 firmware, hacktivated and with ipad baseband option ticked. I then put it into Pwned Dfu, opened tinyumbrella with tss running and restored.

[player04]

Maybe ur battery is dying???