So I have a Blackberry with Verizon now and I think I am eligible for an upgrade. I ALSO have an iPhone 3GS with AT&T at the moment which I can do that trade in deal that Verizon is offering. What do you guys think they will offer me if I give them both those phones and say I want the Verizon iPhone 4 with just my 2 year upgrade on my existing Verizon plan? 1) Will they still give me the credit for the AT&T iPhone 3GS? 2) Will they give me my upgrade for the existing Blackberry I have? I feel like all together I should be walking out of there will little or no cost for everything I am turning in and my upgrade right?