how does this work? it would appear i can buy a new verizon phone through amazon at a deep discount! instead of waiting for my NE2 eligibility in november i'd like to do this. can i just add it to my family plan (replace my phone) not add a new line? does this affect my contract or bill amount in any way? it just seems to good to be true so if anyone has any experience with this any info would be greatly appreciated. thanks, -B