Well okay, looks like this is a system app for Samsung Windows Phones. If you can manually set the APN under cellular+settings then uninstalling this "apn" app would be your best bet. To uninstall it, set your phone's date time year to sometime in 2115. Then come back to the apn app under settings, it should prompt you to uninstall it. Once uninstalled, change the year back to 2015 and reboot
Okay I don't recollect correctly but there should be an editable APN settings under cellular settings. On some phones (ROMs) that setting is disabled. Not sure about your phone's ROMWe don't have option cellular+settings in WP8. This came in WP8.1
APN settings is a seperate option in WP8.
So there you go, this update is meant for WP8.1 and not for WP8.0
Before the updates it was working fine for me on WP8.0, just like the screenshots from Boris.
And afterwards it doesn't even open no more.
Thanks Samsung for another bogus sh*t!
Are you on a Canadian T899M? If not I would check with Boris (above poster) on how to get the 8.1.1 update on the Ativ S. He has been quite helpful to a lot folks here for getting 8.1.1 on their Ativ Ss