So I have 2 lines on my contract, one is grandfathered unlimited plan and the other line has 3GB per month. After text and minutes, it's roughly 155 per month. Now, on my unlimited plan with 6 plus, I use about 6-8 gigs of data every month, and that being said, I always get throttled... the other line with 3GB allowance however, uses less than one gig per month. I've checked on ATT, if I were to switch to 10GB mobile share, it will be only 10 dollars more per month, with unlimited text and minutes and plus mobile hotspot. While in theory I do have my data unlimited, I really just have 5GB of full speed.... My main concern is that, for the past several years, I was always able to get a new iPhone on launch day, we just swap eligibilities. For example, iPhone 4S I used my line with unlimited data, and a year later with iPhone 5, I did a upgrade swap with the 3GB plan, 5S was upgraded with the unlimited data line again, and with iPhone 6 I used the 3GB plan again.... If I were to go mobileshare, will I be able to get a new iPhone every year like i used to? is it a smart idea for my situation?