This is the ultimate testing tool for Samsung devices. It opens a menu allowing you to test:
*#7353# Action: Opens a simpler self-test interface. What you can do: Test speaker, receiver, microphone, vibration motor, and the IR LED (if your A7 variant has it). Exit: Press "Back" or "Finish."
| Code to Dial | What It Does | | :--- | :--- | | *#0*# | The . This code launches a powerful diagnostic tool where you can test LCD colors, touchscreen, vibration, speakers, cameras, sensors, and more. | | *#2663# | Used to check and update the TSP (Touch Screen Panel) / TSK firmware version. | | *#0283# | Performs an audio loopback control test for the microphone and speaker. | | *#0289# or *#*#0673#*#* | Opens an audio test mode to check melody and sound functionality. | | *#*#0842#*#* | Tests the device's vibration and backlight functions. | | *#0588# | Enters the proximity sensor test mode. | | *#0589# | Enters the light sensor test mode. | | *#34971539# | Opens the camera firmware menu, allowing you to check the camera's firmware version and update it. | | *#0782# | Performs a real-time clock (RTC) test. | | *#7353# | Launches an alternative, quick test menu for components like the light sensor, accelerometer, and touchscreen. |
Secret codes, also known as dialer codes or engineering codes, are special codes that can be entered into your phone's dialer to access advanced settings and features. These codes are not well-known and are not documented in the user manual or online documentation. However, they can be used to unlock a range of hidden features and settings on your Samsung Galaxy A7 (2018).
These codes (also known as USSD codes or MMI codes) allow you to test hardware components, retrieve hidden network information, run instant diagnostics, and perform master resets. However, many users report that "codes don't work" on their Galaxy A7. Why? Because Android manufacturers and carriers frequently block certain codes for security reasons. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work
, the integrated default dialer must be utilized. Third-party calling apps downloaded from the Google Play Store cannot initialize system-level MMI codes.
These codes manage specific cellular features rather than device hardware. Function #31# (followed by the phone number) Check Call Waiting *#43# Check Call Forwarding *#67# Important Warnings How to reset your Samsung Galaxy with 5 different methods
If you need to know technical details about your specific unit without digging through settings menus.
Secret and Hidden Codes for SAMSUNG Galaxy A7 (2018) IMEI Number. *#06# Test Mode. *#0*# Battery Status. *#0228#* USB Settings. *# HardReset.info Samsung's Secret Hidden Menu - Now, You're An Expert! This is the ultimate testing tool for Samsung devices
If you suspect your phone has a hardware fault, this is the most important code to know.
Secret codes do not require rooting your phone or installing third-party apps. They are built directly into the official Samsung firmware.
In most cases, the phone will automatically open the hidden menu as soon as the final # is typed.
To successfully run secret codes on any iteration of the Samsung Galaxy A7, follow this exact sequence: Exit: Press "Back" or "Finish
Using secret codes on your Samsung Galaxy A7 is straightforward:
On the running Android 8.0 (Oreo) up to Android 10 (with One UI 2.0), several of these codes remain functional—though Samsung has locked down many since the Android 9 update.
To use these codes, you do not need special software. Simply: Phone (Dialer) Type the code exactly as written (e.g., The menu or information should appear automatically . If it doesn't, press the Essential Codes for Samsung Galaxy A7
The menu will usually open once the last character is entered. If it does not, tap the Call button.