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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."

Disclaimer: The author is not responsible for any software damage or voided warranty resulting from misuse of secret codes. Use at your own risk.

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

Type the code exactly as shown, including all *, #, and numbers. Do not press the call button unless instructed.

If the screen flashes and nothing appears, the code is either blocked or unsupported on your specific firmware version. If you own a Samsung Galaxy A7 (2nd

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. How to Properly Enter Secret Codes on the Galaxy A7 Before diving into the list, follow these critical steps to ensure codes work:

Most codes launch automatically as soon as you type the final character (usually #). If nothing happens, press the green Call button once. These codes (also known as USSD codes or

Open the stock Phone dialer app (Samsung’s default green phone icon). Third-party dialers like Google Dialer often block secret codes.