I want to pay my bill but your system does not want to accept it. Your system shows "Enter a valid card number" or "Enter a valid routing number" for the cards/accounts that have been used for a long time to pay T-Mobile bills without any problems before. That looks to me like a bug in your web/payment system. Please let me know how to overcome this issue.
Hmm that's a little odd. I did some checking on this and didn't find anything going on with the payment system. Are you able to try making the payment using the automated system or the MyAccount app?
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