If the Start At Boot feature in our ScreenCloud Player app is not working for you on a MIUI Android device (for example, if you're using a Xiaomi tablet) it may because of a known issue where MIUI does not allow apps to set that setting in the system.
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To set it yourself, do the following:

1. Open the "Settings" app on your device
​2. Go to "Manage Apps"
​3. Find the "ScreenCloud Signage Player" app and select it and then under "Permissions" go to "Autostart" and make sure it is enabled