We have identified that a recent build of TAMobile 7 iOS went to the iTunes App Store with an incorrect URL override in Settings.
Users updating to the latest version of iOS are not going to be able to log in as a result.
End users can fix the problem themselves. Any users unable to log in should go into Settings change the Hostname field to: www.trackabout.com
This should resolve the login issue.
It may take up to 2 days to get a new version accepted by Apple and published to the iTunes App Store. Their review procedures are unfortunately quite a bit slower than Google's.
We're investigating other possible remedies and will keep updating this incident as we learn more.