Allows an application to write to external storage.
android.permission.WRITE_EXTERNAL_STORAGE
Allows read only access to phone state, including the current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.
android.permission.READ_PHONE_STATE
Allows an application to see the number being dialed during an outgoing call with the option to redirect the call to a different number or abort the call altogether.