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These codes allow you to access hidden diagnostic menus and hardware information.

This guide outlines how to use secret diagnostic and informational codes on your Samsung Galaxy A7 (2016, 2017, and 2018 versions)

Running a hidden code on your Samsung Galaxy takes only a few seconds through the native phone application. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

Type the code exactly as it appears, including the asterisk (*) and hash (#) symbols. Most codes

These codes are specific to Samsung's One UI and provide deep access to hardware and firmware details: Secret Code Hardware Test Menu Check IMEI Number Battery Status & Health Firmware Version Info System Dump (Speed Boost) USB Configuration Advanced WiFi Info The "General Test Mode" (Master Code: These codes allow you to access hidden diagnostic

This is the most comprehensive diagnostic tool. It allows you to test the LCD display , touch sensitivity, LED lights, vibration, and both front and back cameras.

In menus like Service Mode, changing values can lead to signal loss or connectivity issues. Most codes These codes are specific to Samsung's

Using these codes is remarkably simple, as they don't require any special apps or root access.

Accesses phone information, battery history, and Wi-Fi stats. *#301279# - HSDPA/HSUPA Control Menu

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.