News. Mobile Phones. 13 Secret Codes That Unlock Hidden Features on Your Phone. The USSD protocol allows you to access hidden features you didn't know about right from your smartphone's dialer.
'Secret Codes' - List all of Samsung secret codes (HiddenMenu) on your device. Note: You may need ROOT to launch secret codes (use 'Launch 0' method). 'Firmware Browser' - Browse for the stock firmwares available online, for your phone and for any other Samsung model.
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