Can I switch an iPhone 4 from Verizon to AT&T?

My friends giving me her old phone, but she is on Verizon and I'm on AT&T, is there a way to wipe it and change the carriers so I can stay with my plan and #?

Yes! Though, it may cost. So you take the phone to Verizon an asked to get it unlocked. Though, they'll end up charging you a fee because no phone carrier wants to lose costumers. Next you'll take it to AT&T and tell them you got it unlocked make sure you take your old phone with you to. Then they'll ask for your account info. Make sure you tell them you want the same plan and same number as your other phone.

No. You can't use a verizon cdma phone on the att gsm network.
it can't work

addyson,
the iphone 4 from verizon doesn't have a sim card slot, att phones use sim cards.
you really should answer question you know nothing about!

No, Your better off selling and buying a GSM version.

No. I'm not sure where Adysson thinks you're going to put the SIM card that is required to connect to AT&T's CDMA network in Verizon's CDMA phone.

Verizon doesn't unlock phones. Some phones come unlocked for international use. This means they contain a SIM card slot for use with international SIM cards.