Disable OTA updates on the Samsung Galaxy S4

If you have rooted your Samsung Galaxy S4 and you want to disable over-the-air updates, you can try this:

1. Open Root Explorer
2. Navigate to /system/apps
3. Rename SDM.apk to SDM.apk.old
4. Rename SDM.odex to SDM.odex.old

This worked for me. However, if you have the paid version of Titanium Backup you can use Titanium Backup to freeze the SDM app.