3GS 4.3.3 [6.15.0] DFU loop/teathered break
I have brought a second hand iPhone 3GS which is stuck in a semi-DFU loop.
I have got the device to boot with redsn0w-0.9.9b1 in tethered mode and it appears to have the firmware/baseband mentioned above
According to TU, Cydia has full blobs on file for 3.1.3, 4.0, 4.0.1, 4.0.2, 4.1 and partial for 4.2.1.
I am trying to unteather the device, but nothing seems to want to work. I'm not really worried about what version I go to, so started with 4.1. Tried to restore to stock which didn't work [assume because of the BB].
Tried to restore to 4.1 created with snowbreeze which did work, but again would only booth teathered.
Normally at this point I would re-flash to a stock and start again, but because of BB 6.15, i can't.
Does anyone have any ideas?