If you downloaded the installer (.apk file) to your computer, transfer it to your Android device using Bluetooth or USB. If you downloaded the installer directly to your Android device, continue to step 3.
Press and hold the installer file link. Tap OK → Open.
If you see the unknown apps installation warning, tap Settings and tap the slider bar next to Allow from this source. (If you already have unknown sources enabled, skip to step 5)
Tap Install. If you are using Android 5, tap Next three times, then tap Install.
Visit our related Knowledgebase article to complete the ESET Mobile Security for Android installation process starting with step 4.