How to Grant Permissions in your Xiaomi or TCL Device
Prey for Android requires the app to run in the background at any time in order to gather location data and perform actions from your panel. While most Android devices will automatically request all necessary permissions, Xiaomi and TCL devices need additional permissions that to be granted manually. To do so, you can follow this step-by-step:
Before you start!
This guide is based on Xiaomi devices, and thus screenshots and specific app names may vary for TCL devices; however, they should be easily paralleled
Access the Native Security App

Go to the "Manage Apps" Section

Select "Prey" From the List and Toggle Autostart to ON

Tap "ok" on the battery usage warning.
Allow Prey to Display Pop-ups While Running in the Background

Make sure the highlighted "Display pop-up windows while running in the background" option is activated by tapping on it. The next pop-up should be set to "Always allow."
Go to the Battery Settings in the Security App
There, select Prey from the app list, and make sure that the option "No Restrictions" is selected, as per the screenshot below.

And that's it! Your device will now be able to execute all actions sent from the control panel.