I am on a 3 GB shared data plan (2 lines). This month with 2 days left in the billing period, we have used the 3 GB plus about 0.5 GB rollover from last month. ATT texted me they have added an addional 1 GB to this month and billed $15. We are back at home and will use little of the additional 1GB. My question is will the ballance of the 1 GB roll over?
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