I am in the Houston but want to purchase a PRE 3 for going to Saudi Arabia and I think Saudi is mainly GSM there and I will be recieving a smarthphone from work but dont know what brand it will be but will have a SIM. .Should I purchase the Verizon unit or the ATT unit because I read the Verizon unit works on either band and can switch back and forth so my logic was to purchase the Verizon unit and when I get back I can use it for verizon since I will be switching from Sprint( if they dont get there act together) on the data plans . Also would it be complicated to activate this once there because I am being given a activated smart phone there. I was just going to pull the SIM from the phone and put it onto the PRe3 . As far as profiles go I figured i could generate a new one and sync to the touchpad i have alrdy or someone have a better suggestion .Any help would be greately appreciated.