Increase strongly the autonomy of your device!
For instance, no need to keep network connection all the night!
Therefore, you can choose the daily time range while the network will be automatically disconnected and reconnected, via the airplane mode.
test access to protected storage
modify or delete the contents of your USB storage
read phone status and identity
run at startup, prevent phone from sleeping, modify system settings
android.permission.BIND_DEVICE_ADMIN, android.permission.READ_SETTINGS, android.permission.INJECT_EVENT
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