I'm glad you've gone out of your way to make this app, it is really useful. I wish TMO would cater to other devices and their resolutions and such, but this definitely makes great use of the screen for a site that's a real pain sometimes. I've realized two issues though.

1) I'm having the EXACT same problem as Reflektorfalke.
2) If you're TMO username has a "space" in it, you can't login. I've tried applying a space with Swype and the default keyboard, but it appears to not recognize this character, so I can't login...

Hope to hear about a resolution! Thanks!