: If the device still attempts to search for updates over network connections, technicians use ADB (Android Debug Bridge) commands to manually disable the update packages:

Removing MDM from a device that is still owned by an organization, without explicit permission, may be illegal. This guide is intended for devices that you own outright or for which you have obtained proper authorization. Additionally, opening the phone to reach the test point voids any remaining manufacturer warranty. Flashing firmware always carries a risk of bricking the device if the wrong files are used or if the process is interrupted. Always back up your data before starting.

To successfully remove the MDM lock and restore OTA functionality on the CPH2557 model, technicians typically use specific "scatter" files and flashing tools: