1. AC Question's Avatar
    I have two Galaxy S3 SCH-I535 running Android OS 4.3 and 4.4.2. The phones currently don't have SIM cards/service

    I haven't been able to use any of the dial codes that I've come across to unlock the hidden menus. Ultimately I want to lock the technology that the phone is using to make voice/data transfers. I've been able to do this with phone running an older version of the Android OS using codes like *#*#4636#*#*

    I've tried the following codes, none of which result in any change/menu screen:

    I've downloaded the following applications to the phone to unlock the UART settings and the Qualcomm USB settings:

    I tried the following apps from the appstore, but non unlocked the hidden menu:
    MTK Engineering Mode
    Engineer Mode Test Tool
    Service Mode Shortcut
    01-27-2015 05:53 PM

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