IPhone 4 Verizon – change build in Sim !

Hey all ,i’m able to buy an iPhone 4 build in Sim card ( Verizon ) , for a low price ,
Can i replace that build in Sim ore buy a Q-Peel for that iPhone ?
So that i can use any sim i like ?
Answer #1
CDMA iPhones are way to different than GSM phones… so… Why bother and simply go and buy GSM iPhone?!
EDIT:
Like I said, it’s quite impossible because you need to replace whole hardware…