: Updates touchscreen, Wi-Fi, and Bluetooth firmware. *#1234#
(P.S. This is just a draft, I encourage you to add, modify or remove sections as you see fit to make it your own) gsm+secret+firmware
In summary, while "secret" firmware was once a standard for cellular privacy through obscurity, it has become a primary frontier for mobile security research. The independence of these systems makes them powerful but also potentially dangerous if left unaudited. : Updates touchscreen, Wi-Fi, and Bluetooth firmware