Most of unprofessionally unlocked iPhones 3G & 3GS have iPad baseband 06.15.00.
Many folks simply make upgrade from iTunes with that baseband. And the result u could see on the picture above !!
IT MAY BE YOUR TROUBLE TOO !!! BRING IT TO ME AND I 'LL FIX THAT WITH EASE !!
Call/txt at for further specifics
College & Dufferin, Toronto midtown