Here it is May 2,2018 and having the same exact issue cant add a credit card or a bank. Not a good way to start my service. This is your side tmobile nit the end user.
Already have an account? Login
Enter your username or e-mail address. We'll send you an e-mail with instructions to reset your password.
Sorry, we're still checking this file's contents to make sure it's safe to download. Please try again in a few minutes.
Sorry, our virus scanner detected that this file isn't safe to download.