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:
The Samsung Galaxy A7 (2018 model SM-A750) has a hidden universe of diagnostic and information menus. To use these "secret codes," you simply enter them into the stock Phone/Dialer app as if you were making a call Essential Secret Codes for Galaxy A7
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:
This is the most powerful tool for troubleshooting. Once entered, a grid of buttons appears, allowing you to test: Colors (Red, Green, Blue): Checks for dead pixels or screen burn-in.
Allows you to draw on the screen to find unresponsive areas. Vibration & Speaker: Verifies hardware motors and both top/bottom speakers.
Provides real-time data from the accelerometer, proximity sensor, and barometer. Troubleshooting: What if they don't work? how+to+use+secret+codes+on+samsung+galaxy+a7+2+work
If you dial a code and nothing happens, it is usually due to one of three reasons: Auto Blocker:
On newer software updates, Samsung includes an "Auto Blocker" that prevents these codes for security. Disable it via Settings > Security and Privacy > Auto Blocker Carrier Restrictions:
Some carriers (especially in the US like Verizon) disable specific diagnostic codes by default. Dialer App: These codes often only work in the original Samsung Phone app , not third-party dialers from the Play Store. Safe Usage Tips Information Only: Use codes like freely for device specs. Avoid Settings Changes: In menus like Service Mode
), do not change values unless you are a technician, as this can disable your cellular connection. Before using codes like
to delete log files, ensures your important data is backed up. If you're having a specific issue, like poor battery life WiFi drops
, I can walk you through the exact diagnostic steps for that problem. Would you like to know how to interpret the results of a specific test?
Here’s a clear, safe write-up on how to use secret codes on a Samsung Galaxy A7 (2016/2018) — often referred to as the “A7 2” in some regions (second generation of the A series). To use secret codes on your Samsung Galaxy
Important note: These codes are for diagnostic and informational purposes. Misuse can affect device functionality. Proceed at your own risk.
Code: *#0808#
Action: Opens USB settings (not a test per se but allows you to switch between MTP, ADB, and charging modes).
Warning: Do not change these settings unless you know exactly what you are doing—you could disable file transfer.
Before diving into the list, follow these critical steps to ensure codes work:
Step 1: Open the stock Phone dialer app (Samsung’s default green phone icon). Third-party dialers like Google Dialer often block secret codes.
Step 2: Type the code exactly as shown, including all *, #, and numbers. Do not press the call button unless instructed.
Step 3: Most codes launch automatically as soon as you type the final character (usually #). If nothing happens, press the green Call button once.
Step 4: If the screen flashes and nothing appears, the code is either blocked or unsupported on your specific firmware version. and Band Selection .
Pro Tip: Turn off Wi-Fi Calling and VoLTE temporarily. Some carriers redirect USSD codes through their servers, breaking local secret codes.
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."
If your Samsung Galaxy A7 rejects every code, you can still access similar information using trusted apps:
*#0011# to switch LTE bands.*#0011# MenuThe most powerful secret code on the Galaxy A7 is *#0011#. Once inside, you can access deeper menus:
*#0011#.Q (capital Q), then 0000 (four zeros).Band Selection lets you force your phone to use 4G LTE bands only (useful if you’re in a weak signal area). But be careful—changing the wrong setting can break cellular connectivity until a factory reset.
Code: *#0588#
Action: Immediately tests the proximity sensor (used for turning off the screen during calls).
Result: Cover the top front of the phone with your hand. The screen should say "PASS" or "PROXIMITY – ON."