Samsung GS3 - Conditional Call Forwarding
I have a Samsung Galaxy S3 (AT&T), not rooted or anything, same as it was when I bought it from the store. What I'm trying to do is forward calls from certain contacts to a pre-paid cell (also AT&T). Point of this being is that I want to give the phone (and service) to a friend of mine as I don't really use it and his phone is terrible. He is also on Verizon so I can't transfer a SIM card or anything. I want to have the GS3 route my calls to my pre-paid and ring for his calls.
Is there an app that would make it possible to do this?