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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:

If the screen flashes and nothing appears, the code is either blocked or unsupported on your specific firmware version. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

Open the stock Phone dialer app (Samsung’s default green phone icon). Third-party dialers like Google Dialer often block secret codes. On the running Android 8

In this guide, we will walk you through , which codes are confirmed to work, and what to do when a code fails. What Are Samsung Secret Codes? Secret codes are numeric sequences entered into the phone’s native dialer (the same app you use to call people). They start with asterisks (*) and hashes (#). When entered correctly, they trigger hidden activities or "tests" within the firmware. Third-party dialers like Google Dialer often block secret

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.

Now go ahead—open your dialer, type *#0*# , and watch the hidden test menu of your Galaxy A7 come to life. Just be careful what you touch in there. Share it in the comments (for the exact model SM-A750G, SM-A750F, or SM-A750N). And if a code triggered a soft brick, reboot by holding Power + Volume Down for 10 seconds.