mc133j iphone 3gs

MC133J - iPhone 3GS
location: apple.com - date: March 18, 2010
I own an iPhone 3GS Model MC133J (purchased in Japan).The OS is version 3.1.3 (7E18), and the modem firmware is at 05.12.01.After moving to the USA, I concluded and settled the service plan with exclusive carrier Softbank.As a result, the phone receives "No Service."During my attempt to purchase phone service, the staff at the local AT&T store identified that my phone is locked to the carrier, and referred me to both Softbank and the local Apple store.According to the Apple.com forums, Softbank does not offer an official unlock.The Genius Bar had no solution, denying a phone exchange because "the SKU of an Apple Japan phone would be incompatible with the SKU of an Apple USA phone." Question 1: Web forums indicate that the 3G network in Japan runs on W-CDMA, while the AT&T 3G network in the USA runs on EDGE. Is the iPhone 3GS hardware around the world not identical? That is, even if my MC133J were to be unlocked, would the phone opera
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