3 SECRET Codes That 99% People Don’t Know! #Android #Secret #Codes #Samsung #TipsAndTricks
Have you ever wondered what secret features your Android phone is hiding right under your nose? Whether you’re using a Samsung, OnePlus, Xiaomi, or any other Android device, there are secret codes — hidden combinations of numbers and symbols — that unlock powerful diagnostic tools, hidden settings, and fascinating tricks.
In today’s post, we’ll reveal 3 secret Android codes that 99% of people don’t know, along with what they do, how to use them safely, and why you should try them right now. These codes aren’t hacks or illegal tricks — they’re legitimate USSD (Unstructured Supplementary Service Data) or MMI (Man-Machine Interface) commands built into Android systems for advanced users and technicians.
Let’s dive in! 🚀
🔐 What Are Android Secret Codes?
Android secret codes are short numeric sequences you enter into your Phone Dialer app (like you’re dialing a phone number). Once you enter a specific code and press the call button, your phone executes a hidden command — such as displaying hardware information, running a test, or resetting certain functions.
These codes were originally meant for developers, service centers, and technicians, but now anyone can use them. However, some codes can alter your device’s data or settings, so be cautious and always back up important files before trying anything risky.
Now, let’s explore the top 3 secret Android codes most people don’t know about!
🧩 Secret Code #1: *#0*# — Samsung’s Hidden Diagnostic Menu
If you own a Samsung Galaxy smartphone, this code will blow your mind. Type *#0*# into your dialer, and instantly, a hidden diagnostic test menu opens up.
This code gives you access to a complete hardware testing suite — something only technicians typically use. It’s like having a built-in service center inside your phone.
📱 What You Can Test:
- Screen colors: Test red, green, and blue (RGB) colors to check for dead pixels or screen burn-in.
- Vibration: Ensure your vibration motor works properly.
- Touch: Open a touch test grid to verify touch sensitivity.
- Camera: Check the front and rear cameras for focus, flash, and color balance.
- Speaker & Mic: Test sound quality and microphone functionality.
- Sensors: Inspect accelerometer, proximity, barometer, and light sensors.
- Subkey: Test the physical buttons like power and volume.
⚠️ Important Tip:
This menu works only on Samsung phones (and a few select Android models). You don’t need to press the call button — it activates instantly after typing.
To exit, just press the back button or restart your phone.
💡 Why It’s Useful:
- Diagnose screen or hardware issues before going to a service center.
- Test all functions if you’re buying or selling a second-hand phone.
- Check if your device has genuine components after repair.
⚙️ Secret Code #2: *#*#4636#*#* — Android Device Information Menu
This is one of the most powerful and universal secret codes available on almost all Android phones, not just Samsung. When you type *#*#4636#*#* into your dialer, it opens a deep Device Information Menu with several advanced options.
🔍 What It Reveals:
You’ll see a list of diagnostic tools including:
- Phone Information: Displays your IMEI, signal strength, network type (LTE, 5G, etc.), and even the preferred network mode.
- Battery Information: Real-time data like battery health, voltage, and temperature.
- Usage Statistics: A history of which apps you’ve used and for how long.
- Wi-Fi Information: Details about your current connection, signal strength, and nearby networks.
📡 Pro Tip:
You can force your phone to use specific network types, like LTE only or 5G only, using this menu. This is useful if your phone keeps switching between 4G and 3G and you want to stabilize your connection.
Here’s how:
- Go to Phone Information.
- Scroll down to “Set preferred network type.”
- Choose LTE only or NR/LTE (for 5G) if supported.
⚠️ Warning:
Changing network settings incorrectly could affect your signal or mobile data. Only adjust options if you know what you’re doing.
💡 Why It’s Useful:
- Fix signal or data issues.
- Check real-time battery health without a third-party app.
- Get advanced Wi-Fi info for troubleshooting connectivity problems.
- Monitor app usage without installing external monitoring tools.
🧨 Secret Code #3: *#9900# — Samsung System Dump Mode
Another powerful secret for Samsung users is the *#9900# code. It opens something called “System Dump Mode.”
This tool is primarily for developers and engineers, but it has one very practical use that any user can benefit from — freeing up internal storage.
🧹 What It Does:
System Dump Mode allows you to:
- View system logs and dump files.
- Delete unnecessary log files that take up space.
- Manage debugging levels and system processes.
When you enter *#9900#, you’ll see an option called “Delete dumpstate/logcat.”
Tapping this deletes temporary logs and cached files, which can free up hundreds of megabytes — especially if you’ve had your phone for a long time.
💡 Why It’s Useful:
- Instantly free up internal memory without deleting personal data.
- Clear hidden system logs that even cleaner apps can’t access.
- Improve speed and performance on older Samsung phones.
⚠️ Caution:
Don’t change anything else inside System Dump unless you’re familiar with Android debugging tools. Stick to the “Delete dumpstate/logcat” option.
🧠 Bonus Codes You Might Want to Try
Here are a few bonus secret codes worth knowing:
| Code | Function | Compatible Devices |
|---|---|---|
*#06# | Displays your phone’s IMEI number | All phones |
*#1234# | Shows firmware and build version | Samsung |
*#0228# | Detailed battery status | Samsung |
*#7780# | Factory data reset | All Android phones (⚠️ Deletes data!) |
*#*#7780#*#* | Android factory reset command | Universal |
Always double-check before executing any code. Some (like reset codes) will erase your data permanently.
⚡ Pro Tips Before Using Secret Codes
Before experimenting with Android secret codes, follow these safety tips:
- ✅ Backup your data: Always save photos, contacts, and documents before using service menus.
- 📴 Do not modify unknown settings: Some menus allow system-level changes that can disrupt your device.
- ⚙️ Try in safe mode or airplane mode: This prevents accidental dialing or interference during tests.
- 🔋 Keep your battery charged: Some diagnostics may drain power quickly.
- 💬 Test responsibly: Don’t use codes meant for network operators unless instructed by your carrier.
🎯 Final Thoughts
There you have it — 3 secret Android codes that 99% of people don’t know!
From diagnosing hardware with *#0*#, to checking device info with *#*#4636#*#*, and cleaning up system logs with *#9900#, these hidden tricks give you professional-level control over your smartphone.
Whether you’re a tech enthusiast, Android tinkerer, or just curious, exploring these secret menus helps you understand your phone better and solve issues faster — without needing extra apps or a trip to the service center.
Remember, with great power comes great responsibility! 🧠
Use these codes wisely, and your Android will thank you with smoother performance and better reliability.
📲 Have you tried any of these Android secret codes?
Drop your experience in the comments below and share which code surprised you the most!
Don’t forget to share this post with your friends — most people have no idea these features even exist!
#Android #Samsung #SecretCodes #TechTips #MobileHacks #TipsAndTricks #SmartphoneSecrets