How+to+use+secret+codes+on+samsung+galaxy+a7+2+work _verified_ May 2026

To use secret codes on your Samsung Galaxy A7 (such as the 2018, 2016, or original models), you simply

enter a specific sequence of numbers and symbols into the phone's native Dialer app

. 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

: In most cases, the hidden menu or information will appear immediately after you press the final key. If it does not, you may need to tap the Essential Secret Codes for Samsung Galaxy A7

Below is a list of the most functional codes for diagnostics and information: Hardware & System Diagnostics (General Test Mode)

: This is the most comprehensive diagnostic menu. Use it to test: : Check for dead pixels using Red, Green, and Blue screens.

: View real-time data from the accelerometer, proximity sensor, and magnetic sensor. : Verify the touch sensitivity of every part of the screen. : Test the front and rear cameras independently. (Battery Status)

: Provides real-time data on battery voltage, level, and health.

: Avoid tapping "Quick Start" in this menu, as it can occasionally cause OS instability. (Quick Test Menu)

: A simplified version of the general test mode for quickly checking the speaker, vibration, and basic sensors. Device Identification & Information (IMEI/Serial Number)

: Instantly displays your device's unique identification numbers. (Firmware Version)

: Shows the current software version, model name, and AP/CP/CSC details. *#12580*369# (SW & HW Info)

: Displays both software versions and the hardware production date. (Service Mode)

: Provides technical details about your network connection and cell signal. System Control & Maintenance (SysDump Mode)

: Allows you to delete junk system log files, which can help free up internal storage and improve speed. (USB Settings)

: Change how the phone is recognized by a computer (e.g., MTP, ADB, or Mass Storage). ⚠️ Important Usage Safety Carrier Restrictions

: Some codes may be disabled by your service provider or depend on your specific firmware version. Risky Codes : Avoid codes that perform a Factory Reset *2767*3855# ) unless you intend to erase all data from your device. No Experimentation

: These tools are designed for technicians; changing settings in menus like the Service Mode

without knowing their function can disrupt your phone's connectivity or performance. factory reset using physical buttons if the screen is unresponsive? Samsung Codes List: All Secret & Diagnostic Codes (2026)

The Samsung Galaxy A7 is a sophisticated device with various hidden diagnostic and functional menus known as secret codes or USSD codes. These codes allow you to access system information, test hardware components, and troubleshoot performance issues without needing external software. Understanding Secret Codes

Secret codes are essentially shortcuts programmed into your phone's firmware. When entered into the dialer, they trigger specific actions or open hidden menus. They are particularly useful if you are buying a used phone and want to check if the screen, sensors, or battery are still in good health. How to Enter Secret Codes

Using these codes is straightforward and does not require rooting your device or specialized technical knowledge. Open the Phone app (the dialer) on your Samsung Galaxy A7. Tap on the Keypad tab. Type the code exactly as it appears (e.g., *#0*#).

In most cases, the menu will appear automatically. If it doesn't, press the Call button. Essential Samsung Galaxy A7 Secret Codes 🛠️ Hardware Diagnostic Menu: *#0*# how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

This is arguably the most important code for any Samsung user. It opens a comprehensive testing grid where you can verify: Red/Green/Blue: Checks for dead pixels on the display. Vibration: Tests the internal vibration motor.

Touch: Allows you to draw on the screen to ensure every millimeter of the touch digitizer is responsive.

Sensor: Displays real-time data from the accelerometer, proximity sensor, and barometer. 🔋 Battery Status: *#0228#

If your battery life seems short, this code provides detailed technical data.

Voltage and Level: Shows the current health and charge state.

Quick Start: This button can sometimes reset the battery gauge if it is miscalibrated, though it should be used sparingly as it can temporarily cause erratic percentage readings. 📱 Device Information

IMEI Number (*#06#): Shows your unique device identifier. This is essential for reporting a lost phone or checking if a device is blacklisted.

Software Version (*#1234#): Displays your current firmware details, including the PDA, CSC, and MODEM versions.

Firmware Update Info (*#2663#): Primarily used to check and update the Touch Screen Panel (TSP) firmware. 📶 Network and Connectivity

USB Settings (*#0808#): Changes how your phone connects to a PC (MTP, ADB, or PTP). Use this if your computer isn't recognizing your device.

Service Mode (*#0011#): Provides deep technical details about your current cellular connection, including band frequency and signal strength. Safety Precautions

While these codes are powerful, they should be used with caution:

Avoid "Reset" Codes: Some codes can trigger a factory reset without warning, erasing all your data. Always back up your phone before experimenting.

Don't Change Settings You Don't Understand: In menus like Service Mode, changing values can lead to signal loss or connectivity issues.

Official Sources: Only use codes from reputable sources like the Samsung UAE Support Page or HardReset.info to ensure compatibility. Troubleshooting: Why a Code Might Not Work

If you enter a code and nothing happens, there are a few common reasons:

Carrier Restrictions: Some network providers (like Verizon or AT&T) disable certain USSD codes to prevent users from altering network settings.

Software Updates: Occasionally, newer Android versions (like One UI) relocate or disable older legacy codes.

Typing Errors: Ensure you haven't missed a * or # at the beginning or end.

To use secret codes on your Samsung Galaxy A7 (including the 2018 model), you simply need to open the Phone app, navigate to the Keypad, and dial the specific sequence of symbols and numbers. Most codes will trigger a hidden menu or display information immediately after the last character is entered. Common Secret Codes for Samsung Galaxy A7 *#0*#

General Test Mode: Access a menu to test hardware like the display (LCD), vibration, touch sensitivity, and sensors. *#06#

IMEI Info: Displays the unique IMEI and Serial Number of your device. *#1234# To use secret codes on your Samsung Galaxy

Firmware Version: Shows detailed software information and model name. *#0228#

Battery Status: Provides real-time data on battery health, voltage, and level. *#9900#

SysDump: Opens a menu where you can delete log files (dumpstate/logcat) to free up system memory. *#7353#

Quick Test Menu: A faster alternative to test specific functions like the melody, camera, and dimming. *#0011#

Service Mode: Shows technical network connection details and status. How the Codes Work

Direct Activation: Unlike standard phone numbers, these codes (also known as USSD or MMI codes) do not require you to press the "Call" button. The system recognizes the pattern and launches the hidden interface automatically.

Hardware Diagnostics: Codes like *#0*# are primarily used by technicians to verify that the screen, speakers, and cameras are functioning correctly before or after a repair.

Carrier Limitations: Some codes may not work depending on your mobile carrier, as some providers disable certain diagnostic menus. Other Hidden Features

To use secret codes on your Samsung Galaxy A7 Go to product viewer dialog for this item.

(including 2016, 2017, or 2018 models), open the Phone app and enter the code directly into the dialer keypad. Most codes will execute automatically as soon as the last character is typed, while some may require you to press the Call button. Essential Samsung Galaxy A7 Secret Codes

These codes are frequently used for diagnostics and retrieving device information:

Accessing secret codes (also known as MMI or USSD codes) on a Samsung Galaxy A7 (2018) Go to product viewer dialog for this item.

or similar A-series models allows you to perform hardware diagnostics, view system information, and troubleshoot firmware issues. How to Use Secret Codes Open the Phone app (default dialer) on your device. Tap the Keypad icon.

Type the specific code using the numeric keys. Most codes start with *# and end with #.

The menu will usually open automatically once the last character is entered. If it does not, tap the Call button.

To use secret codes on your Samsung Galaxy A72

, simply open your Phone app, tap the Keypad tab, and dial the specific string of characters (like *#0*#). Most codes will execute automatically as soon as the final character is entered. Essential Secret Codes for Samsung Galaxy A72

These codes allow you to diagnose hardware, check device health, and view technical specifications.

*#0*# — General Test Mode: 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.

*#06# — Device Identity: Instantly displays your phone's IMEI and Serial Number, which are essential if your phone is lost or for warranty verification.

*#0228# — Battery Status: Provides a detailed real-time look at battery voltage, temperature, and current charge level.

*#9900# — SysDump Menu: Used to manage system logs. A popular use is clicking "Delete dumpstate/logcat" to clear junk files and potentially improve performance. Open the Phone App : Open the Phone

*#1234# — Firmware Info: Shows your exact model number and firmware versions (AP, CP, and CSC).

*#2663# — Advanced Firmware: Accesses the firmware menu for Wi-Fi and the touch screen panel (TSP). You can use this to refresh Wi-Fi versions or update touch firmware.

*#0011# — Service Mode: Displays technical network information, including signal strength and SIM status. Call and Privacy Settings

These codes manage specific cellular features rather than device hardware. Function Hide Caller ID #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

Unlock Hidden Features on Your Samsung Galaxy A7 (2018) with Secret Codes

Are you looking to unlock hidden features on your Samsung Galaxy A7 (2018)? Do you want to access advanced settings and configurations that are not available through the standard user interface? Look no further! In this post, we will show you how to use secret codes on your Samsung Galaxy A7 (2018) to access a range of hidden features and settings.

What are Secret Codes?

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).

How to Use Secret Codes on Samsung Galaxy A7 (2018)

Using secret codes on your Samsung Galaxy A7 (2018) is easy. Here's how:

  1. Open the Phone App: Open the Phone app on your Samsung Galaxy A7 (2018).
  2. Enter the Code: Enter the secret code using the keypad.
  3. Press Call: Press the Call button to activate the code.

List of Secret Codes for Samsung Galaxy A7 (2018)

Here are some secret codes that work on the Samsung Galaxy A7 (2018):

  1. #0#: This code opens the Service Menu, which provides access to advanced settings and features such as display testing, speaker testing, and more.
  2. *#06#: This code displays the IMEI (International Mobile Equipment Identity) number of your device.
  3. *#07#: This code displays information about the device's hardware and software, including the processor, RAM, and firmware version.
  4. *#1234#: This code displays information about the device's firmware, including the firmware version and build number.
  5. *#2663#: This code opens the Device Info menu, which provides information about the device's hardware and software.

More Secret Codes

Here are some more secret codes that work on the Samsung Galaxy A7 (2018):

  1. *#0228#: This code opens the Sensor and Proximity Test menu.
  2. *#0289#: This code opens the Debug Screen menu.
  3. *#0842#: This code opens the Device Test menu.
  4. *#0#: This code opens the Field Test menu.

Tips and Precautions

Here are some tips and precautions to keep in mind when using secret codes on your Samsung Galaxy A7 (2018):

  • Be careful: Some secret codes can potentially harm your device or erase data. Use them at your own risk.
  • Test carefully: Test each code carefully and understand what it does before using it.
  • Reboot your device: After using a secret code, reboot your device to ensure that the changes take effect.

Conclusion

What if a code doesn’t work?

  • Check that you typed it correctly (common mistake: missing * or #).
  • Restart your phone and try again.
  • Use an app like “Secret Codes” (from Play Store) to see which codes are available on your specific A7 model.

Essential Samsung Galaxy A7 Secret Codes

Here is a list of the most functional and useful codes for the Galaxy A7.

6. RF and Antenna Test (Radio Frequency)

Code: *#0011#
Action: Opens Service Mode with real-time network information.
What you see: Signal strength (RSRP, RSRQ), band number (e.g., Band 3, Band 20), cell ID, and LTE parameters.
How to navigate: Use the volume keys to scroll; press the back key (not the home button) to exit. This is a goldmine for troubleshooting weak signal.

Unlocking Hidden Features: How to Use Secret Codes on Samsung Galaxy A7 (2nd Gen) That Actually Work

If you own a Samsung Galaxy A7 (2nd generation)—often referred to as the Samsung Galaxy A7 (2018) or the SM-A750F/DS—you are holding a device packed with hidden potential. Beneath the sleek One UI interface lies a powerful diagnostic toolset accessible only through "secret codes."

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.

In this guide, we will walk you through exactly how to use secret codes on the Samsung Galaxy A7, which codes are confirmed to work, and what to do when a code fails.

Step 2: Enter the Code

  • Type the code exactly as shown, including the asterisks (*) and hashes (#).
  • Do not press the call button – most codes will activate automatically as soon as you type the last character.

2. General Hardware Tests (Service Menu)

Code: *#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."

What to Do If a Code Doesn’t Work

  • Some codes are disabled by carriers (e.g., Verizon, AT&T).
  • Android updates may remove certain codes.
  • Try enabling "Test mode" or dialing from the stock Samsung dialer (not a third-party app).