Go to Windows Settings → Apps → Find "CSMG B2C Client Tool" → Uninstall. Then delete any leftover folders in C:\Program Files and %AppData% .
In some regions or for specific legacy devices, OTA updates are rolled back or halted due to carrier restrictions. Users who wish to manually update their device to the latest security patch or Android/iOS version often rely on this tool to side-load the update package manually. Please Install Csmg B2c Client Tool