Disable Development Mode on your device
Development Mode allows you to remotely install and launch an application on BlackBerry 10 devices.
If you don't intend to do development activities, we strongly recommend that you turn off Development Mode for increased security.
To disable development mode:
On the home screen, swipe down from the top of the screen.
Tap Settings > Security and Privacy > Development Mode.
Tap Development Mode from the list of security options.
Tap the Use Development Mode toggle switch.
If prompted, type the password for your device, and tap OK.