UPDATED: T-mobile have completed the maintenance.
Users have now the option to pay through carrier billing as usual.
We have been informed that T-mobile is currently carrying out maintenance.
IMPACT: During this maintenance window the option to make payments on phone bill will be unavailable; users will be able to make payments by credit card and Paypal instead.
Start Time: Wednesday 23rd May, 2012 00:00 am PST
End Time: Wednesday23rd May, 2012 06:00 am PST
Bango Customer Services