Unlocking Difficulties (different sim detected)

[RudBallaMike]

hi everyone.
i am having trouble with iphones and unlocking them.
All the iphones I do are first generation 8gb.
They run version firmware 2.2
I use quickpwn.
I have done 6 that will work after i unlock and jailbrake them. I will stick my tmobile SIM in and it works perfectly.
But i have had issues with 3 right now.
I do the same exact thing with these phones as the other ones.
I quickpwn them, and then after i do that i stick in my tmobile sim and it says different sim detected, please connect to itunes.
Its making me mad because i don't know why.
I tried my friends AT&T sim that he is currently using and it says the same thing.
Any help would be highly appreciated!

[dejawoo]

Try bootneuter on cydia to flash your baseband...

[RudBallaMike]

yea i already tried that,
every time up bring up bootneuter
it will either crash or just freeze on the main page

[jtholb]

I'm having similar difficulties. Bootnooter is for the iphone 2g and it either crashes or freezes on an iphone 3g.

I've reinstalled yellow sn0w 0.9.6, re-pwned and rebooted numerous times, so any ideas would be greatly appreciated.

[jtholb]

I found a solution that worked for me! Hopefully this helps.

GUIDE: How to fix "different sim detected" after jailbreak/unlock - iPhone 3G | iPod touch Forums

[zonatigre]

I ran into similar problem with the "Diff sim detected pls connect to itunes" after running qckpwn225 to my 1st gen(v1)8g iphone. It won't even recognized my other ATT chip.