T-Mobile has informed us of an issue on their SMS platform between December 17th and December 30th, 2009 which meant that a significant proportion of Delivery Reports were not correctly routed. Because of this, the billing transactions for PSMS traffic were not correctly completed; however, it is likely that the end users did receive the content correctly.
We will be working with T-Mobile to rebill these users correctly.
Because these messages will be rebilled in January, T-Mobile will outpay for the billing transactions as part of the January settlement. Partners should therefore be aware that the December settlement will be lower than expected, and the January settlement will be correspondingly higher.