According to a leaked internal document, AT&T will be increasing its pay per use data rate on July 31st from the current $0.10/KB rate to an adjusted $2/MB rate for new customers, contract extensions with voice plan changes, customers that call in for data usage credits, ask specifically for the new rate and downgrade data plans, all actions which will change the pay per use rate on the account.
The rationale for the changes is to persuade customers on the merits of bundling to more lucrative data plan bundles with higher usage caps instead of relying on occasional data usage, with each Pay Per Use data session being rounded up to the next full megabyte for billing purposes.
To clarify, this means that a ringtone, application download, or WAP session would go from initial cost + $0.1 per KB of transfer to initial cost + $2 per megabyte regardless of total data transferred as it will be rounded up to the next megabyte, ensuring that data transfer will always be charged at $2.
The example given by AT&T corroborates the above formula by charging $4 for 1.2 MB of data transfer on account of the first megabyte being charged at $2, then rounding up the 200 additional KB to another full megabyte bringing the total to $4 at a linear rate relative to data transfer.
The lone exceptions to the new changes are current customers on older plans who do not make any plan/add-on changes, Legacy Family Talk, Go Phone, Resellers, International plans, remaining Legacy Blue and Dobson customers as well as Business Pool Nation customers and iPhone users with bespoke plans.
This article was rewritten in order to clarify information left out of the initial report and to correct arithmetic as well as carrier information errors.