I am one of the lucky ones that has unlimited data. I have had the same plan since the 3GS was released and my wife and I currently pay $130.00 a month for two iPhone's with unlimited data with more than enough minutes and a few hundred text messages. I have the 64gb 5s and she has the 64gb 6. I have never had to pay more than a $100.00 for a new phone as we are on opposite year upgrades and we each keep our phones for two years and then sell them which pays for the latest iPhone. I don't see any way that switching plans or going with NEXT saves me money. My 5s will be two years old in September and I have Apple care. Should I try and get a replacement with Apple care due to the battery wearing down and keep the 5s as long as possible? Try and get a 6 with a new two year contract or hope that I can possibly get a new iPhone on launch day one more time under contract.