*#1111# – Shows the Service Mode software version. 3. Network and Battery Troubleshooting
: Paints a grid over the glass panel. Draw lines through all boxes; if any box stays white, that specific digitizer zone is broken.
Secret codes are special sequences (like *#0*# ) you type into your phone's dialer. This is why you must use Samsung's pre-installed Phone app; third-party dialers might not recognize them. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work
. These codes, often called MMI or USSD codes, grant access to hidden diagnostic menus, hardware tests, and detailed system information not found in the standard settings menu. How to Execute Secret Codes Open the Phone App : Launch the default dialer you use to make calls. Enter the Code : Type the code exactly as written (e.g., Automatic Launch
Secret codes are hidden commands you can enter into your phone's dialer to access powerful diagnostic menus, test hardware, and retrieve detailed system information not normally available through standard settings. They're like a shortcut for technicians and power users, allowing for quick checks or resets. A great example is that instead of going through multiple menu options, you can instantly access a full hardware test menu with just one short code. *#1111# – Shows the Service Mode software version
: Provides real-time data on battery health, voltage, and level. *#9900#
Samsung Galaxy devices, including the popular A7 series (specifically A7 2017 - SM-A720F and A7 2018 - SM-A750), contain a hidden set of diagnostic, testing, and configuration tools known as "secret codes" or "USSD codes." These codes allow users to unlock hidden menus, troubleshoot hardware, check battery status, and change advanced settings that are not available in the standard Android settings menu. Draw lines through all boxes; if any box
Runs specific diagnostic tests for GPS location tracking.
How to Use Secret Codes on Samsung Galaxy A7 Go to product viewer dialog for this item. (2016-2018): Complete Guide Samsung Galaxy A7
: Make sure you are on the standard numeric dialer screen.