I don't know why this is on the iPhone 4 board. However, I upgraded to the iPhone from a Samsung Renown, which is also a global flip phone. I encountered the limited GSM service problem in Asia after I changed my VZW number by porting my landline. My SIM card was no longer activated after the number change. The limited service message means that you can only place emergency calls. I recommend that you call Global Support at 908-559-4899.