[wampuscat]

to answer sum of your questions . yes the the sprint version is cdma , but it has a quad band radio to pick up gsm. only 1 radio can be used at the time. the security/sid unlocker unlocks security so u can flash another rom. the WU unlocker allows u to flash a patched radio( by cmonex of coarse) to allow the phone to pick up US GSM networks. the stock sprint configuration will already allow foreign gsm networks to work. I am pretty certain that on US GSM networks you'll have voice and EDGE data but no 3g. but it takes the WU unlocker to even pickup these networks