Android is the most popular mobile operating system today, powering more than 3 billion devices. Almost every Android smartphone has advanced security features integrated into them. Some of them have been automatically activated by the installed Android system. If you’ve been using Android phones for a while, you might be aware of these secret security codes. These are also called the USSD (Unstructured Supplementary Service Data codes) codes or secret codes. You can use a list of Android secret security codes to access your smartphone’s features, especially the security features without going through the usual settings of the Android smartphones.  

To run any Android secret security code, you must use the dialer/phone app on your phone. If the USSD codes are entered correctly, the code will return a response automatically. If not, there won’t be any response or a simple error message quoting “Connection problem or USSD/MMI code.”

So what are the best Android security codes? And what do the “secret USSD codes” on Android phones do?

But before we move ahead, we want you to know how to run USSD codes in Android smartphones. Using USSD codes is way simpler than you think, you just need to open the dialer on your phone and hit the key combination. 

How to run the best secret codes on your Android devices

1. Go to the Phone app from the home screen of your Android device.
2. Now, you just need to type the secret USSD codes listed by us to open the desired features or functions. The secret security coders on Android may start with an asterisk (*) or a hashtag (#). 
3. Press the Call button, and the USSD code will start to load and the desired function is opened. 

Now that you know how to run top USSD codes on Android devices, let’s jump right into the Android secret code list for 2022. 

What is USSD code?

USSD (Unstructured Supplementary Service Data) is a Global System for Mobile (GSM) communication technology that is used to send text between a mobile phone and an application program in the network. USSD Codes can be used for various works such as a (Wireless Application Protocol) WAP browsing, prepaid call services, mobile money services and so more. These USSD codes can be used to check your prepaid mobile balance and more. 

What is MMI code?

An MMI (Man Machine Interface) code is a value that works as a command to the device. Every code that you enter over your phone’s dialer app that contains an asterisk (*) or hash (#) characters is an MMI code. These secret Android codes are used to obtain various information such as checking prepaid SIM information, while you can enable/disable certain prepaid services of your SIM. 

Disclaimer: The Android secret code listed in this article might work universally on every phone or on selected smartphone models. 

List of Top Android Security Codes to Unlock Hidden Features

1. How to find an IMEI number on Android using a secret security code? 

Secret code: *#06#

IMEI stands for International Mobile Equipment Identity. It is a 15 unique numeric code that acts as your device ID which helps track an uncompromised or stolen device or just for verification purposes. So, if you are purchasing a new Android device, you need to ensure that the device IMEI matches the one mentioned at the back of the box. To access the IMEI information, you can enter *#06# in the dialer which will allow you to see the IMEI code as well as the serial number of your Android smartphone. 

2. Hidden Android secret code to disable Caller ID

Secret code: *31#

If you don’t want your contact to appear on the recipient’s device and figure out how to disable caller ID using USSDs, we have got you covered. To disable a caller ID on the recipient’s phone, you can simply dial *31# on your phone app. You can also enable the caller ID using the same USSD on your Android device. But, before you complete the action, please ensure whether the input secret code on Android has enabled or disabled the caller ID feature. 

Note: This Android secret code might only work on old phones and not newer phones.

Also read: How to fix Phone app not working on Android

3. How to activate general test mode on Android?

Secret code: *#0*#

You can activate the general test or diagnostics mode by dialing *#0*#. It is one of the best Android secret codes that helps to test several mobile functions including hardware issues like

screen issues, dim Light, touch, vibration, etc. If you are looking to play around with general test mode please make sure to know the method of exiting this function. That’s because some smartphones use volume up to switch from one function to another. Just in case you got stuck in a function, just keep pressing the power button until the power menu appears, simply restart your device afterward.

Also read: How to fix common Google Pixel 6 and Pixel 6 Pro problems

4. How to turn off an Android phone without the power button? 

Secret code: *#*#7594#*#*

If the power button on your device is not working, there’s a way around to turn your device off without using the power button. Surprised? You can dial *#*#7594#*#* on the phone dialer app to instantly shut down your device. It is one of the top Android secret security codes to shut down your device immediately in any unforeseen situations. Generally, you need to hold the power key to open the power menu to shut down the device, but dialling the above USSD will shut your device down in the blink of your eyes. If the power button of your phone is not working after being exposed to water or moisture, this Android secret code will certainly come in handy.

Note: The smartphone will request a passcode on startup to confirm that you’re the rightful owner.  

Also read: How to fix common Samsung Galaxy S22 series problems

5. What is the secret code to wipe the Android phone?

Secret code: *2767*3855#

All smart devices, be it Android or iOS, tend to run into bugs. Sometimes they can troubleshoot easily and sometimes those nasty bugs require resetting the phone entirely. So, if you want to factory reset your device to resolve these issues, you can use an Android secret security code to perform the action without going to the settings app. To wipe your data from the Android device, you need to run the above-mentioned USSD code by calling from the phone app. As soon as you run these secret Android hidden codes on your Android mobile phones, all the personal data including media, files, and apps are effectively deleted and the device is wiped clean. What’s good about this USSD code is that it wipes your device and reinstalls the firmware as well, so it’ll be as good as a new Android smartphone, software-wise.

Also read: How to Reset Network Settings on Android 11

6. How to enable and disable call forwarding using USSD codes?

Secret code: *#67#

The *#67# USSD code tells you whether the call forwarding option is enabled on your device or not. This Android secret code also shows you the number of all your forwarded calls. You will also get to know whether the calls are being forwarded after a call is rejected or when the number is busy. 

Also read: How to fix incoming calls not showing on Samsung Galaxy Devices

7. How to check battery status, WLAN, and other info using the Android secret security code? 

Secret code: *#*#4636#*#*

If you’re looking to view the battery, Wi-Fi Status/WLAN (Wireless Local Area Network), and other additional phone information, you can simply dial *#*#4636#*#* and all the above-mentioned parameters can be viewed. Besides the WLAN and battery status, these USSD secret codes can be used to know the app usage details as well as Wi-Fi information. All in all, this secret code for Android acts as a security feature. 

Also read:  How to Fix Wi-Fi Not Turning on Samsung Galaxy Devices

8. Android secret phone code for quick backup of media files

Secret code: *#*#273283*255*663282*#*#*

If you are figuring out how to backup all media files stored in your device using USSD code, just type in

*#*#273283*255*663282*#*# on your phone app keypad. Doing this will back up all the photos, audio, and videos stored on the internal storage of the smartphones. After you hit this USSD code, a file copy screen will open where you can quickly backup all the media files without going to the Settings or Files app. 

Also read: How to TikTok not working on Android

9. Android secret code to access system and storage information

Secret code: *#3282*727336*#

Here is another hidden USSD code for Android devices that will show you some of the crucial data of your device such as system and storage information. With the USSD code *#3282*727336*#, you no longer have to follow the usual way of accessing the system and storage information from the settings app of your smartphone. 

Also read: How to Back up any Samsung Galaxy Phone 

10. Hidden USSD codes for Android camera information 

Secret code: *#*#34971539#*#*

If you want to know the camera information including the firmware version, maximum zoom, number of cameras, and more, just dial *#*#34971539#*#* on your phone dialer app. It is one of the most useful secret codes for Android devices to detect any kind of firmware tampering as these days cameras come with several modules. So, if you are willing to access camera information using an Android secret code, this is the one to try. 

Also read: How to Fix Camera App Not Working on Samsung Galaxy Smartphones

11. Android secret code to display MAC address

Secret code:(*#*#232338#*#*)

If you are suspecting any malicious activity on your network, you should check if the MAC address of your device is changed. If you are not aware, a MAC address is a unique identifier assigned to a network interface controller (NIC). It is an essential component required for network protocols, such as TCP (Transmission Control Protocol). This secret security code will provide you with the MAC address information of your Android device. By dialing this USSD code you can see if the MAC address still matches your network, if it doesn’t, please make sure to check for possible network breaches. Your network could be hacked and important data could get stolen. 

Also read: How to Clear Cache on Samsung Galaxy Devices

12. What is the secret Android USSD code to access firmware info?

Secret code: *#*#4986*2650468#*#*

Firmware information is important for Android users as it allows users to know if the firmware of the device was compromised. Please note that firmware changes can potentially damage your device. So, if you want to know how to check firmware information using secret code on Android, just dial *#*#4986*2650468#*#* in your dialer app. Using these Android security secret codes, you can access various information such as exact smartphone model, hardware information, manufacturing date, PDA (Personal Digital Assistant), as well as RF (Radio Frequency) call date. 

Also read: How to fix incoming calls not showing on Samsung Galaxy Devices

13. Android secret code to display RAM information

Secret code: *#*#3264#*#*

Did you know there is an alternate method to check the RAM information other than the traditional method? For that you need to type

*#*#3264#*#* on the phone app to view the RAM information. For your reference, one could access the RAM information on your Android device using the settings app of your phone. 

Also read: How to Spotify not working on Android

14. Android Secret MMI code to check the software version

Secret code: *#*#1111#*#*

Bored of viewing the software information with the usual method? Just dial *#*#1111#*#* on your dialer app to check the software information on the Android smartphone. This hidden code for Android displays the software version on which your device is running. 

Also read: How to fix Play Store not updating apps

15. How to view hardware versions using secret MMI codes?

Secret code: *#*#2222#*#*

If you are looking for an Android secret phone code for the hardware version (a hardware version is used to identify the type of hardware on which the software is running in your smartphone), simply dial *#*#2222#*#* on your device. You can view smartphone models, CPU information, GPU information, chipset information, and more using this secret USSD on your Android device. 

Also read: Twitter for Android not working? Here’s how to fix it

16. Android USSD code to test the phone’s LCD Display

Secret code: *#*#0*#*#*

The LCD test allows you to test the smartphone screen by displaying various solid colours so that you can notice any dead and stuck pixels. Are you not sure how to test the Android LCD test using MMI codes? Don’t worry, it’s pretty simple. You just need to dial *#*#0*#*#* and continue with the test. If you find any disparities, you can further test your display using a third-party app.

Also read: Best DisplayPort Monitors for Gaming

17. How to perform touch screen tests with secret Android codes? 

Secret code: *#*#2664#*#*

Are you wondering what is the secret code to perform touch screen tests on Android devices? If so, just dial

*#*#2664#*#* on your Android phone dialer app. After you run the USSD codes, a test screen will appear which requires you to continuously touch the screen making sure the box is checked and turns green.

Also read: How to Reset Network Settings on Android 11 devices

18. Wi-Fi test Android hidden USSD code

Secret code: *#*#232339#*#*

Are you looking to use hidden USSD codes to test Wi-Fi on the Android smartphone? You can simply type *#*#232339#*#* on the phone app of the Android device you are using. What information can you view using these Android secret codes? This secret USSD code for the Wi-Fi test allows you to view SSID, Wi-Fi speed, Wi-Fi status, MAC Address, etc. 

Also read: What is Wi-Fi 7: Here’s all you know

19. Android secret phone code for vibration and backlight test

Secret code: *#*#0842#*#*

You can dial *#*#0842#*#* on the Android phone dialer app to test and vibration and backlight. After you type in this secret Android code, the phone will vibrate allowing you to know if the vibration motor works perfectly on your device or not. Similarly, you can use this secret USSD code for the brightness/backlight test on your Android smartphone. 

Also read: How to fix Notifications not working on Android 11

21. Bluetooth test Android secret USSD code 

Secret code: *#*#232331#*#*

If you want to test the Bluetooth connection of your Android device using a secret code, simply hit *#*#232331#*#* on your phone app. 

22. Android security code to run full GPS test

Secret code: *#*#1575#*#*

Not sure about the accuracy of GPS on your phone? To run a full GPS test using Android secret code, you need to type *#*#1575#*#* on your dialer app. 

Also read: How to fix GPS not working on Samsung Galaxy smartphones

23. How to test audio using Android secret MMI codes?

Secret code: *#*#0289#*#*

If you are looking for an Android secret code to test audio, you should type *#*#0289#*#* on the stock dialer app. If your smartphone is not producing any media or system sounds then you need to run a quick diagnostic test to see whether it’s a software problem or a hardware issue. This command will enable you to hear any type of audio played during the test. Just in case you are unable to hear any sound during the test, you might want to get the speakers off your Android device checked from the respective manufacturers’ service center. 

24. Secret codes to test the proximity sensor on Android device

Secret code: *#*#0588#*#*

If you are looking to know how to check the proximity sensor on an Android device, you can use a secret security code for the same. To test the proximity sensor, you can dial

*#*#0588#*#* to perform the proximity test where the sensors can detect nearby objects without physical contact. With the proximity sensor our device screen seems to know to switch off when you hold it up to your ear during phone calls, preventing any errant button presses. 

Also read: How to fix Google Maps not working on Android

25. Android USSD code to check Radiation level (SAR)

Secret code: *#07#

You can check the Radiation level in terms of SAR of your Android smartphone by dialing a secret USSD code, *#07#. If the results show the SAR value below 1.6 watts per kilogram (1.6 W/kg) then it is OK, else you are advised to change the smartphone immediately as the prolonged exposure to the phone might lead to serious damage to your health.

Also read: How to fix Galaxy S22/S22+/S22 Ultra Overheating

FAQs related to Android secret security codes you can try

a) Do I need to know Android secret security codes?

Well, it depends. If you are tech-savvy and understand the technical jargon used in smartphones, you can get useful information using the USSD Android codes. Also, if you are an aspiring Android developer, you should know these secret USSD codes to unlock hidden Android features for various purposes such as testing, diagnosis, QC, etc. Even if you are an average Android user who wants to play around with Android devices, you can try these secret codes. With that said, we also want you not to continue with any secret codes that you are not sure of, you might damage your device or brick it. 

b) How do I use a secret security code on my Android device?

It doesn’t matter which Android device you are using, you can access hidden settings right from the dialer app of your phone. Normally the secret security codes on Android devices contain an asterisk and hash with some string of numbers in between. Some codes are manufacturer specific and therefore might not work with all Android smartphones.

c) Why isn’t an Android secret code working on my device?

Even though there are several secret codes to unlock hidden features on Android devices that are universal, there are many codes that are specific to certain manufacturers as well as models of smartphones. So, if you come across any codes that aren’t working on Android, you need to understand that you may have input a wrong secret code or it may not work on your device at all. What can you do? Simply skip it and try other USSD codes.

d) How to know if the secret USSD codes worked on your Android?

As we have mentioned in the previous point, certain codes on our guide might not work on some Android devices as they are specific to some manufacturers or models. Coming back to your question, when the code on Android runs successfully you’d see a pop-up menu appear. If not, it means the code does not work with your device.

That’s all for now in this article where we have discussed some of the best Android secret security codes you should know in 2022. Stay tuned for additional Android secret codes and hacks, we will update them soon. Please make sure to bookmark this blog and share it with your fellow Android enthusiasts.