I was told to come here from the forums at macrumors.com

I have an UK OOB iPhone on O2 PAYG that I accidentally upgraded to 113 through iTunes and so lost phone functionality. I've tried all the current variants of the 4.6 bootloader unlock, but so far nothing has been successful. Can anybody help?

Thanks in advance.

Just do this

http://hackint0sh.org/forum/showthread.php?t=25577
at this point here in the guide 10. Jailbreak 1.1.2

(if you get 0 dialing back to you after *#306# do the install again, its not worked)

I had to run ibrickr to get the phone out of dfu mode i then ran the windows.bat

And it worked patched the image


So we now have our 1.1.2 iPhone jailbroken w/o phone capabilities.
Extract the iBrickr 1.1.3 special edition and run the ibrickr.exe.
Follow the simple instructions in the application.
Ok after this i did the 1.1.3 update in installer Apps

this took about 20mins to

I then had a 1.1.3 JB phone and itunes activated straight away

What ever you do DONT RESTORE YOUR ITUNES !!

Hope this helps

I'm sorry, I don't quite follow. The guide says it's for official O2 iPhone customers only, which I'm not, I want to use my pre-pay O2 SIM in my iPhone. I'm on 112, with modem firmware 04.02.13_G, but still can't get any signal, I just get 'No Service' next to my Wi-Fi icon.

Can anybody help?

There are threads on this, and it's mentioned in the giant BL 4.6 thread. Search for "brick tool".