I'm a little confused with the info out there on the latest cellular ipad air. From what I read all are unlocked and that the main flavors sold are ATT/T-mobile/Verizon/Sprint but that all of them are essentially the same and have the same cellular radio capacity (I am looking at out of contract, full-priced purcase). The only exception being that Sprint only allows Sprint-marked ipads on their network. Does this mean that the Sprint ipad is actually the most versatile in terms of cellular network comparability? The reason I am asking I am looking at buying a sprint version (MF024LL/A or MF025LL/A) at Target and want to make sure I'm not missing anything (or limiting myself) that I could get on the ATT or Verizon versions of the ipad. I am actually not that interested at the time in a Sprint data plan (though that day might come) but I am kind interested in T-mobiles free 200MB plan since I plan to use mostly on wifi but may occasionally use the 4G data if T-mobile is really offering 200MB for life on any new ipad bought from any carrier.