[How-To} Unlock Your GSM iPhone to use on Other Carriers!

hi i have a ? and dont know if this is the right spot for this but any way i was wondering i have a sprint 4s which is what is the sim card for in my iphone i take it out and phone still works turn off the phone reboot and still works so i also want to know could i use the sprint sim for an unlocked ipad???




ps.if this is not the right spot for this admins please move or remove thanks inavance.