How+to+use+secret+codes+on+samsung+galaxy+a7+2+work 【2026 Update】

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.

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

Secret codes can give you quick access to hidden menus, testing features, and device info. Here's how to use them: how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

Using these codes is simple and does not require any third-party applications.

Code: *#0283#
Action: Checks microphone, speaker, and modem voice path. Useful after water exposure or muffled call quality. Code: *#0011# Action: Opens Service Mode with real-time

Code: *#34971539#
Action: Opens advanced camera firmware updates and tests.
Use cases: Verify camera sensor type (Sony vs. Samsung sensor), update camera firmware, or test camera modules individually.

| Code | Function | |------|-----------| | *#0*# | Hardware test menu (LCD, touch, sensors, camera, etc.) | | *#0011# | Service mode (signal strength, network info) | | *#0228# | Battery status (voltage, temperature) | | *#0808# | USB settings (MTP, ADB, etc.) | | *#1234# | Show firmware version (AP, CP, CSC) | | *#12580*369# | Software/hardware info | | *#2663# | Touchscreen firmware version | | *#34971539# | Camera firmware details | | *#7353# | Quick test menu (speaker, mic, vibration) | | *#9900# | System dump & log menu (advanced) | Code: *#0283# Action: Checks microphone, speaker, and modem

If you’ve typed a code from the working list above and nothing happens, try this: