If Applicable: Restoring Custom Partition and Custom Applications
If a device had a custom partition before the upgrade, it has been downloaded and activated again after the upgrade profile has been unassigned; see Unassigning the Upgrade Profile and the Universal Firmware Update. It cannot be ruled out that custom commands and the applications and drivers of a Custom Partition disturb your device's system. Therefore, it is very important to check the Custom Partition, the custom applications, and the device's basic functionality.
Test the Custom Partition and the custom applications. If errors should occur, modify the Custom Partition and the custom applications accordingly.
Check if all other functions are still working properly.
Check List
The Custom Partition and the custom applications are enabled and can be used.
All other functions are working properly.