I am totally surprised from so call this big carrier , that their app is down for whole 24 hrs and no response from company, I wanted to give my donations but the app is down whole day, I don't care, they can suck my ....
We'd love to help out, however we'd need some more information. Can you please let us know what exactly is going on with the app? Are you stuck at a particular screen or is there an error message?
That said, some common fixes when there are any app glitches are:
1. Delete the app and install it again
2. On Android, clear the app cache via the phone settings
Try that out and let us know if it helps!