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When I try to access Access Point Names on my Android device, the menu option is grayed out and not accessible.
Cause
When the device is enrolled as Device Owner and you have installed an APN profile, the Access Point Names (in Settings→Connections → Mobile Networks) is locked by the system. The SIM card is linked to the APN profile and cannot be changed.
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You need to remove the APN profile from the device. Before you do that, connect to Wifi or you may loose lose connection to your device!
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How to remove APN Profile
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