Setup Guide

On most middle to high end Android devices released after 2016, Island can be setup straightforward without hassle. But still on some devices, you may got “incompatible with your device” message on Google Play Store, or be notified during the setup with error message “Sorry, your device (or ROM) is incompatible with Island”, or other failures. In these cases, Island could probably still work on your device if setup manually.

If you are prompted to encrypt your device during the setup, it means your device was not pre-encrypted out of box. If you don’t want device decription (which may significantly degrade overall I/O performance on some low-end devices), it can be avoided with manual setup.


First of all, you need to connect your Android device to a computer with USB cable, and the official ADB tool provided by Google.

To check whether the USB-connected Android device is properly recognized by your computer, type the following command in the shell (or Command Prompt on Windows):

adb devices

If no device is listed in the output, your Android device is not correctly recognized by the computer.

For Windows PC, this official guide and driver list for common OEM might be helpful. If it does not work out, the official Google Android USB driver should work for most Android devices, just manually install it, and select “Android ADB Interface” or “Android Composite ADB Interface”.

If your device is Xiaomi branded or runs MIUI, extra steps are required:

Manual setup for Island

Type adb -d shell to open ADB shell, and execute the following commands one by one in sequence:

If succeed, you will be prompted with the ID of newly created user (usually 10 or above). Remember it and replace the <user id> in following commands with this ID.

If you got “Error: couldn’t create User”, execute setprop fw.max_users 10 first, then retry the command above.

It prints the path of the APK file of Island on your device. Copy the full path (after “package:”), and paste it to replace the <path> potion of the following command:

After the installation, proceed to the activation step: (slightly different by Android version)

If you get error message java.lang.SecurityException: Neither user 2000 nor current process has android.permission.MANAGE_DEVICE_ADMIN, please review the MIUI-specific steps above in “Preparation”.

If all goes well, Island will show the app list.

Manual setup for Island in “God mode”

God mode could even work together with normal mode in Island, giving you full control on apps both inside and outside of Island. Starting from Android 8, you can setup Island in God mode directly from Island settings - Setup, click the wrench icon on the side of Island. Prior to Android 8, you can also follow the manual steps to setup normal mode, as mentioned above.