Current Verizon customer but serioulsy considering ATT. My montly data usage varies greatly and with V (less than 250 mb to over 8 GB) I can change my data allowance and back date it to the begining of the billing cycle, avoiding overage charges. Wondiering if I can do the same with ATT? If I see that I am going to go over my current allowance, can I backdate the change or does it only take effect with the next billing cycle? Looking for someone with actual experience.
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