Unable to make payment

They are providing best services i have an problem before one year they solved my problem quickly. will share more info here.

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.

I've encountered this in the past (some year ago) as well as today. The current ios app doesn't allow hyphens in the cc# field, automatically defaults to numeric key entry (no hyphen available), and will truncate the string even if you try to paste in the full number including hyphens. However, if you use the web login after giving up on the mobile app, you'll find the cc# field is configured to automatically insert hyphens and will accept the string in that format, which is apparently what their backend system is expecting. Bottom line is, using the mobile app to try to pay by cc will fail due to this misconfiguration.

I agree with the above comments that this is a fundamental issue that needs immediate attention.The term "embarrassing" comes to mind.

I have the same problems too. Tried on Edge, Chrome Firefox. But if I'm using the Chrome autoload the credit card number, the error went away. The next problem i have now is unable to click Save and Continue. It remained greyed out and I can't go any further. Same goes to all other browsers and handphones i tried. It's ridiculous!

Having this issue still in 2019. I’ve attempted to enter many different card numbers, through several different browsers, but still getting the same error message. I reached out to a rep via chat, and was advised that there is an issue with the payment system that could take a few hours to fix. Also, it appears that all of my saved card information has been deleted, so I’m not able to make a payment that way either.

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.

6/2019, and I'm having this issue. REPEATEDLY..

How is it that T-Mobile's team of "engineers" can't either share a workaround, or actually - gasp - implement a fix?

Seriously, the UX on this webpage is godawful...so many weird login quirks.

Their idiot CEO spends too much time with trump.

I saw this issue going on a few months ago. We'd need you to Community-2153​ and have one of our Team of Experts or T-Force folks file a Help Desk ticket. That'll be the way to get this resolved.

Credit card not valid problem.  I've been paying my bill through the website for years the same way.  This is frustrating and not acceptable.  Last billing cycle worked fine.  So it would be nice to hear an offiicial update from the support team.