You don't say what provider your co-worker has.
You would only be able to use the iPhone 5 from your co-worker on Verizon if she used it on Verizon.:smileyhappy:
Oh the tragedy! I definitely want you in a phone that working! To be sure that this phone (thank goodness for friends!) will work on our system, click the link http://bit.ly/nsiBHo and check the ESN/MEID to see if we can get it to work on our system.
Sadly no, her phone is an unlocked phone from AT&T.