Not to replace the iPhone though! Just to play with for a while, I'm a gadgeteer. I'm trading my everio video camera for an Unlocked G1 I'm curious of something though. If I take my SIM out of my iPhone 3G and place it in the G1 phone, will it mess anything up on my AT&T service?.. Will at&t be like.. "wtf mate, we're booting you!" or something? ha ha.. I don't have a lot of experience in the GSM network range, I've always been an Alltel/Cellular one customer with motorolas before this iPhone I have now. thanks !