How to avoid system update for Samsung Galaxy Note 4?
There are many ways to disable OTA's, all depending on your particular device and AOS version etc. However, most ways require you to be root. Then the most easy way is to use the package managers built-in block function, which blocks packages. Use it like: pm block &lt;package name&gt;. E.g. pm block com.sec.android.fotaclient, would block the FotaClient.apk. Often there are various scripts available, that runs through a list of these packages, specific to your device. Or you can also use great apps like App Quarantine, Titanium Backup or by using some Windows tool like Debloater. You can also edit the file extension of the OTA certificate to prevent installs. (Sorry, forgot the exact path and file name.)