Device Unlock is an Android app developed by T-Mobile USA (12920 SE 38th St, Bellevue, WA 98006). Others apps created by T-Mobile USA are: T-Mobile MyAccount, T-Mobile Tuesdays, T-Mobile Visual Voicemail.

Device Unlock first became available on 06 Aug 2014. It is estimated that Device Unlock has been downloaded between 1000000 and 5000000 times from the Play Store.

Device Unlock 1.2.38 requires the following permissions:

Allows applications to access information about networks.

Allows applications to open network sockets.

Allows an application to read from external storage.

Allows read only access to phone state, including the phone number of the device, current cellular network information, the status of any ongoing calls, and a list of any PhoneAccounts registered on the device.

Required to be able to reboot the device.

Allows an application to receive the ACTION_BOOT_COMPLETED that is broadcast after the system finishes booting. If you don't request this permission, you will not receive the broadcast at that time. Though holding this permission does not have any security implications, it can have a negative impact on the user experience by increasing the amount of time it takes the system to start and allowing applications to have themselves running without the user being aware of them. As such, you must explicitly declare your use of this facility to make that visible to the user.

Allows an app to create windows using the type TYPE_SYSTEM_ALERT, shown on top of all other apps. Very few apps should use this permission; these windows are intended for system-level interaction with the user.

Allows an application to write to external storage.