Unable to make payment

Same here, it's been 2 years and they haven't solved it yet. Also the app does not work, it says "Sorry we're not ready for you yet". Such a bad service.

Their difficulty with input formatting extends beyond cc numbers...they can't get it right with phone numbers either.  Phone numbers, think about that. Anyway, about a year ago I couldn't logon using the same saved account info I always used, which was my phone number with parens and dashes in the number.  Strip those out, logging in using the same old password worked just fine.

Not exactly high on the list of troubleshooting steps these days.  In fact, I'll bet the last time I had web form input validation or formatting problems with a credit card or phone number I was probably using Netscape over dial up.

Now I can't pay a bill because the pay by cc goes to the list of saved payment methods, but none can be selected. I can delete or add all the cards I want, just can't use any of them.  Maybe a server has a bad floppy drive, who knows.

For the last 3 months I've  needed to refill I've had this problem. Trying 2 different computer 3 different browser and different card, the form highlights as red right away saying the card number is not valid. 

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?

I'm currently having the same issue, trying to pay my bill but I keep receiving an error "Enter a valid card number." I tried two different cards and I still get the same error.

Hola @mad_cow  and sorry it's giving you a rough time but let's get you some help. What browser are you using? Have you tired another browser? Is it just happening on the website or have you also tested the T-Mobile app to see if you can make a payment? Please let us know so we can help. ¡Gracias!

I have the same problem - for some reason the system does not show the credit card you guys have on file and forced me to add a new card - I enter a valid credit card number - and the validation states its not a valid credit card number

Using Firefox 54.4.1 (64bit)

I tried Safari - and there the existing credit card is shown, and payment went through without a problem

Same here.. did not work with google chrome, but worked on edge.

I had trouble refill my phone from Denmark I could not get in to my account ,I got to the part where show the image ,but there were none.

and then try again after 24 hours ,the same happened every day, I am now past my dead.line and lost my money,

my soninlaw has away that make the browser think you are in USA , and it worked on my husbands account , but when we tried again for me

it failed .

Since it's not working on Chrome, have you checked to see if there are any updates for that browser? You could also try clearing the history for it and giving it another shot to see if that helps. If this is still an issue, please let me know. ¡Gracias!