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  • [Help] I need help unlocking my iPhone and getting it out of boot loop

I mistakenly updated my iPhone's bootrom. It's a 3GS (new model).
I sent it to a professional, after he updated its bootrom to iPad's 6.15, and after loosing all battery, it's gotten stuck on the "connect to iTunes" screen. It has iOS 4.1 on it.
I tried restoring (in DFU mode) to iOS 4.2.1, while having tinyumbrella turned on (I don't really know exactly what am doing, only approximately), but its returning ERROR 2005.

I don't have any options but to ask for help as I don't know where to take it from here.

Thanks in advance, hope I didn't leave important details out.
Build a custom firmware which does not force bb upgrade (redsn0w or pwnagetool)
Restore in dfu mode (you have ur shsh?) while tinyumbrella server is running.
After error use redsn0w to fix recovery.
If it does not work.
Get ifaith from ih8snow.com should also work