It's here! if you don't use it all this month, it rolls into next month. Currently, limited to 1 month on the mobile share value plan (which I have!)
excited.
http://www.att.com/shop/wireless/rollover-data.htmlRollover DataSM
Only available with Mobile Share Value® plans. Unused data from the monthly plan allowance carries over for 1 billing period. Unused Rollover Data automatically expires after 1 billing period, with any plan change, or when a group or account is terminated. Rollover Data is always consumed last, after your other data allowances. Visit http://www.att.com/rolloverdata for more info.
excited.