hi. i am in sort of a bind. i am on att mobile share (non-NEXT) for three lines. my parents are on really old iPhones. i lost my iPhone so i need a new one. my parents said they are more than fine with iPhone 6 which costs around $20 on ATT NEXT. i am going with apple upgrade program for 6s because its considerably cheaper and basically comes with applecare for free. the reason i don't do all 3 lines on apple upgrade program is that it doesn't seem like apple upgrade program offers leasing for older phones like the 6 which i wanted to for my parents. I REALLY REALLY didn't want to fragment my bills and accounts. is there any suggestion? thanks so much.