Dear Admins
Good Day
when i found your website I really was happy ... finally i can upgrade my iPhone 3G and be able to have advantage with downloading the new apps again ..
my I phone is iPhone 3G ... LOCKED ... baseband 06.15.00 so i need to go throw Whited00r 7.0 Unlocker if I am not wrong ..
I went throw all the procedures successfully :
I downloaded redsn0w
I downloaded the original IPSW 4.2.1
I downloaded Whited00r7-iPhone3G-Unlocker.ipsw
as you suggested i downgraded the Baseband from 06.15.00 to 05.13.04 with redsn0w successfully ..
THE PROBLEM :
in the last step I had put the PHONE on DFU mode successfully and now go to LAST STEP ..
when I open my iTunes and connected the iPhone ... I click SHIFT + Restore and choose the Whitd00r IPSW
iTunes gives me the following ERROR : "The iPhone "iPhone" could not be restored because the firmware file is not compatible "

Please HELP ... Guide me what to DO ..
Thanks
Ali
Edit by bcooperizcool to provide more keywords in the title