Top Secret Android Phone Codes You’ve Never Tried Before

Did you know your Android smartphone hides powerful secret menus and diagnostic tools that most people never access? These Android phone codes can reveal hidden system information, testing tools, and advanced settings — all accessible directly from your phone’s dialer.

Whether you’re a tech enthusiast or just curious about what’s hidden beneath your Android interface, this guide will walk you through the most useful Android phone codes in 2025, how to use them safely, and what each one does.

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🔍 What Are Android Phone Codes?

Android phone codes are special numeric combinations you can type directly into your phone app to open hidden menus or access deep system settings. These codes are officially part of Android’s base source code — meaning they theoretically work on all Android phones.

However, some manufacturers (like Samsung, Xiaomi, or OnePlus) also add their own custom codes. In this article, we’ll focus on base Android phone codes that work across most devices.

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🔹 Samsung Secret Codes (2025)

Note: Some Samsung One UI 6+ phones (2024–2025) restrict access to certain service menus for security.

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🔹 Xiaomi / Redmi / POCO Secret Codes (MIUI 14 – HyperOS)

Tip: Xiaomi’s “CIT” menu (*#*#6484#*#*) is one of the most powerful diagnostics menus on Android — use it for hardware checks.

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🔹 OnePlus Secret Codes (OxygenOS 14 / 15)

Tip: On new OnePlus (Android 15) builds, *#808# opens an internal diagnostic tool with test modules for display, camera, and sensors.

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🔹 Google Pixel Secret Codes (Android 15 – 2025)

Note: Pixels rely heavily on *#*#4636#*#* for most hidden testing — Google removed many older diagnostic codes for security reasons.

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🧠 Pro Tip: Universal & Safe Codes (Work on most Android phones)

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📱 Universal Secret Codes That Work on All Phones

Not all secret codes are Android-exclusive. Here are two universal MMI codes that even work on iPhones:

*#06# – View Your Device IMEI & Serial Numbers

Type this code to instantly reveal your phone’s IMEI, serial numbers, and device IDs. You may also see barcodes — take a quick screenshot and save it for future reference.

*#07# – View Regulatory Information

Displays the regulatory labels and certifications for your phone. While not particularly useful daily, it’s handy to verify compliance or check model details.

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🧩 The Real Android Secret Codes (Stock Android)

To access most hidden Android menus, you’ll use this format:
*#*#CODE#*#*

As soon as you type the final “*”, the menu will appear automatically. Note that the code will disappear even if you mistype — so don’t panic if nothing happens.

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🔧 *#*#4636#*#* – Android Testing Menu

This is one of the most powerful and useful hidden Android phone codes.

Inside the Testing Menu:

• Phone Information – Shows your hardware and network data, including signal strength (in dBm), connection type, and other advanced details.
• Usage Statistics – Lists how long each app has been used and when it was last opened.
• Wi-Fi Information – Includes three submenus: Wi-Fi API, Wi-Fi Config, and Wi-Fi Status, where you can view signal strength, MAC address, connection speed, and more.

⚠️ Warning: Avoid changing network settings here unless you know what you’re doing. Incorrect changes may affect connectivity.

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📅 *#*#225#*#* – Calendar Information Menu

This secret code opens the Calendar Info Menu, displaying all the Google calendars linked to your device, along with how many upcoming events each has. It’s useful if you manage multiple accounts and want to confirm they’re syncing properly.

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☁️ *#*#426#*#* – Firebase Cloud Messaging (FCM) Diagnostics

This code opens a diagnostic menu for Firebase Cloud Messaging, the system Google uses for push notifications and Play Store updates.

• Tap the three dots on the top right to view Advanced Info and event logs.
• Use the Events button to view connection activity and network logs.

This code usually only works on phones using the Google Dialer app.

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📞 *#*#886266344#*# *– Visual Voicemail Configuration

This Visual Voicemail configuration menu lets you:

• Sync voicemail manually.
• Access hidden network configuration settings (not recommended to edit).

If voicemails aren’t syncing properly, using this menu can sometimes help trigger updates.

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🐾 *#*#729#*#* – Pet Mode (Paw Mode)

A fun Easter egg from older Android versions, Pet Mode would show a cat or dog paw animation when receiving a call. Unfortunately, it’s no longer active in recent Android versions but may still work on older builds.

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📡 *#*#2627#*# *– CMAS Testing Mode

Enables Cell Broadcast Testing Mode, used for internal network tests. Typing the code again disables it. While not directly useful to average users, it’s an interesting hidden function built into Android’s infrastructure.

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☎️ *#*#828282#*# *– Telecom Developer Menu

This code opens the Telecom Developer Menu, designed for debugging call features. In newer Android versions, it may appear empty. It’s linked to “Enhanced Call Blocking” features depending on your carrier.

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💡 *#*#8477#*#* – Android Tips Menu

Listed in the Android source code as TIPS, this code supposedly displays Android pro tips and tutorials. It might only work on older devices, but it’s worth testing if you’re running an older Android version.

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📶 Carrier-Specific Codes (Work on All Phones)

Besides Android’s built-in secret codes, mobile carriers like Verizon, AT&T, and T-Mobile offer short codes for billing and data info.

These are called Star Codes, Pound Codes, or Service Shortcodes.

These codes work on Android and iPhone and send a text message with your requested information.

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🧠 Bonus: Manufacturer-Specific Hidden Codes

Different brands add their own secret menus. For example:

• Samsung: Access advanced diagnostic tools like camera, speaker, and vibration tests.
• Google Pixel: Use diagnostic codes for battery health and hardware checks.
• OnePlus / Xiaomi: Custom engineering menus for system testing.

Always search:
👉 “[Your Phone Brand] secret codes 2025”
to find the latest hidden menus for your device.

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⚠️ Important Safety Note

While exploring Android phone codes can be exciting, use them with caution. Some codes can alter system settings, clear data, or change configurations unintentionally. If you’re unsure, avoid confirming any prompts or toggles.

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✅ Final Thoughts: Hidden Power of Android Secret Codes

Android’s open-source nature gives users access to advanced testing tools and developer options that other operating systems hide. From checking your IMEI number to viewing deep Wi-Fi stats, these hidden Android menus can help you understand your device better.

So go ahead — try a few safe codes like *#06# or *#*#4636#*#*, and see what hidden treasures lie inside your smartphone.

Frequently Asked Questions — Top Secret Android Phone Codes

Quick answers about using hidden Android dialer codes safely, how they work across brands, and what to watch out for.

1. What are Android “secret codes” and how do I use them? +

Secret Android phone codes are short dialer strings (often containing * and #) that open hidden menus, diagnostic screens, and service tools. Open your Phone app, type the code exactly, and the hidden menu will usually appear. Behavior varies by brand, Android version, and carrier.

2. Are these codes safe to use? +

Many codes (like *#06# to show IMEI) are safe. Others can change settings or perform factory resets (*#*#7780#*#*, *2767*3855#) and are dangerous. Always back up your data and avoid destructive codes unless you know exactly what they do.

3. Why do some codes not work on my phone? +

Manufacturers (Samsung, Xiaomi, OnePlus, Google) and network carriers may block or change codes. New Android security updates also remove certain shortcuts. If a code does nothing, it’s likely blocked on your device or Android version.

4. Which brand codes should I trust for diagnostics? +

Brand-specific diagnostic menus are usually trustworthy: Samsung’s *#0*#, Xiaomi’s CIT menu *#*#6484#*#*, OnePlus engineering mode *#808#, and Pixel’s info via *#*#4636#*#*. Use them to test display, sensors, GPS, Wi-Fi, and audio.

5. Will using secret codes void my warranty or brick my phone? +

Most read-only diagnostic codes do not void warranty. However, codes that reflash firmware or perform low-level resets could lead to problems and might be considered tampering by some service centers. Avoid destructive codes unless you have expertise and backups.

6. How should I prepare before trying advanced or reset codes? +

Backup photos, contacts, messages, and important files to cloud storage or a PC. Ensure at least 50% battery, disable screen lock if required for testing, and write down your Google account credentials (required after factory resets).

7. Can carriers block these codes or provide their own? +

Yes. Carriers sometimes disable vendor diagnostic codes and provide their own USSD codes for balance checks and service commands. Operator USSD codes are carrier-specific and unrelated to manufacturer hidden menus.

8. Where can I find a brand-specific list for my phone? +

Phadera Tech has brand-specific lists for Samsung, Xiaomi/Redmi/POCO, OnePlus, and Google Pixel in our main guide. If you share your exact model (e.g., “Samsung Galaxy S23 Ultra”), we can provide tailored code warnings for that device.

Still unsure? If you want, reply with your phone brand & model and we’ll flag which codes are safe, advanced, or dangerous for your exact device.