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

Unlocking Hidden Features: A Guide to Secret Codes on the Samsung Galaxy A7

The Samsung Galaxy A7 (2018) is a capable mid-range device known for its triple-camera setup and Super AMOLED display. However, beneath the standard One UI or Samsung Experience interface lies a hidden layer of software known as "Service Mode." This hidden layer is accessed via secret codes (also known as USSD codes or dialer codes).

Whether you are a technician troubleshooting a device or a power user wanting to verify hardware integrity, these codes provide shortcuts to vital diagnostic tools.

Note: Please proceed with caution. Some codes access settings that can alter system behavior or delete data (like a factory reset). It is recommended to back up your data before experimenting.

9. USB and Charging Port Test

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. how+to+use+secret+codes+on+samsung+galaxy+a7+2+work

10. Factory Reset (Full Wipe)

Code: *#*#7780#*#* or *#27663368378# (depends on firmware)
Action: Resets the phone to factory settings.
Critical warning: This deletes all your data (apps, accounts, settings). No confirmation beyond a single pop-up on some variants. Back up everything first.
Note: On many Galaxy A7 units with Android 9+, this code is disabled. Use the Settings menu instead for safety.

How to Properly Enter Secret Codes on the Galaxy A7

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. Unlocking Hidden Features: A Guide to 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. How to Properly Enter Secret Codes on the

Pro Tip: Turn off Wi-Fi Calling and VoLTE temporarily. Some carriers redirect USSD codes through their servers, breaking local secret codes.

Reset / Factory Codes (Use with caution)

• *2767*3855# — Full factory reset (wipes all data, internal storage).
• *#*#7780#*#* — Factory reset (keeps media, wipes settings).

⚠️ Back up your data before using reset codes.