I know I shouldn't hold my breath for this one...but I'd love to see unused data carryover to the next 90 day cycle (or whatever term you are on). There could even be a cap on it, ie. maxium amount of "2gb" (for example) can carryover. I'm not very consistent with my data usage, some terms I use up almost all my data while other times I have a lot to spare. This would certainly help me balance it out. I noticed the data add-ons are quite expensive.