Can i use the blackberry bold for sprint?

Hi if you want to unlock your Blackberry bold from AT&T network .Then visit Theunlockspot.com here they ask you the IMEI number of your mobile .Then at last they deliver you code to unlock your mobile.But unlocked gsm phone cant be used on CDMA network .So even you unlock your Blackberry from AT&T network you cant use it on sprint network .