This is a workaround for users of MobileSell that have trouble with their MobileSell account(s) disappearing after a reboot.
This behavior is due a bug in Android 4.1 (Jelly Bean) that affects the accounts created by paid apps. This app is free so it can work around this issue by providing a temporary MobileSell account authenticator that can be retained over a reboot. For details of this issue please see: http://code.google.com/p/android/issues/detail?id=34880
Thanks to Marten Gajda for his reference implementation of this workaround.
To enable the workaround, install this app and keep it installed.