If the OTA update fails, a manual installation is the most reliable fix. You will need a computer and a FAT32-formatted USB drive or MicroSD card.
Sometimes an update finishes but breaks the hardware mapping. zxdz 01 android update fix
Check the Date/Time: Ensure the device is set to "Network Provided Time." If the date is stuck in the past, the security certificates for the update will fail. If the OTA update fails, a manual installation
"Verification Failed" errors during the installation process. Step 1: Perform a Soft Reset and Cache Clear If the OTA update fails
Before attempting a deep system flash, try to clear the temporary update files that might be corrupted. Navigate to Settings > Apps > All Apps. Find System Update or Software Update. Select Storage and tap Clear Cache and Clear Data.