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Secret codes for Android devices: A comprehensive list of custom dialer codes

Secret codes for Android devices: A comprehensive list of custom dialer codes

If you happen to be an ardent tech enthusiast, chances are high you know about most of the secret codes for mobile phones, you know, the ones that usually begin with “*#.” For those unaware, mobile phones have long had hidden codes that can be used to access interesting hidden apps and settings.

These codes can be broadly classified into two main categories USSD codes and MMI codes. While mostly not very useful to the average smartphone owner, these hidden codes can be used once in a while just to satiate your curiosity. The purpose of this article, therefore, is to create a comprehensive list of these secret codes for Android devices.

Before we start, it might be a good idea to learn about what these codes are and what the differences are between MMI and USSD codes. But if you’re in a hurry, you might as well skip to the part where we talk about specific smartphone codes.

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What are USSD and MMI codes?

AndroidPIT secret codes ussd 9209
All it takes to use these codes is typing them into the dialer. / © NextPit by Irina Efremova

While the average user might not even need to know the difference between these two, it is always good to know what the differences are. Both USSD and MMI codes usually begin with an asterisk or a pound symbol/hashtag. These codes are updated regularly as new versions of Android software are released, and some manufacturers have their own additional special codes.

The code entry procedure is very simple and only requires you to bring up your dialer keypad and enter the appropriate number sequence. It's important to note that some codes are carrier-specific, so they won't work on all devices. So if your phone doesn't respond to a code, don't dwell on it, just move on and find another one.

USSD Codes

USSD stands for Unstructured Supplementary Service Data, and these codes are typically used to communicate between your smartphone and your mobile network operator. This also means that you almost always need to be connected to your carrier for USSD codes to work. 

In the past, USSD codes were used to start/stop specific value-added services. They were also helpful in letting you know about the data usage and prepaid balance and to access a whole lot of carrier-specific information. 

While these are still used by smartphone enthusiasts, USSD codes have largely fallen out of favor among general users because most carriers have their own app/website where most of this information could be easily accessed. USSD codes are typically carrier-specific and will differ from one carrier to another. You will need to contact your carrier for the ones relevant to you.

MMI Codes

As for MMI codes, these are part of something known as the Man Machine Interface schema and are generally specific to a smartphone brand or model. MMI codes let you access several interesting things on your smartphone – ranging from your IMEI number and SAR values to hidden menus that are generally used by smartphone engineers and repair services. 

For example, several smartphones let users type in an MMI code and let them access a  ‘test’ menu. This menu lets users quickly perform various tests on their smartphone ranging from the camera and vibration motor tests to speaker and display tests.

Note that there are only a few MMI codes that typically work on all Android smartphones. We have listed the most popular ones in the generic list of codes below.

Generic secret codes for Android devices

These codes are mostly universal and should work on all Android devices, no matter the manufacturer. There might still be carrier restrictions on certain codes, though, so they're not all guaranteed to work.

Info codes

Generic secret codes for Android phones (Info codes)

 
CODE FUNCTION
*#06#     Show phone's IMEI
*#07# Displays the Specific Absorption Rate (SAR) value of the device
*#*#225#*#* Displays calendar storage info
*#*#426#*#* Google Play Services info or Firebase Cloud Messaging diagnostics (Select devices only)
*#*#759#*#* Access Rlz Debug UI (Select devices only)
*#0*#     Info menu (Select devices only)
*#*#4636#*#*  Info menu (Select devices only)

*#*#34971539#*#*

Camera info (Select devices only)
*#*#1111#*#*  FTA software version (Select devices only)
*#*#1234#*#*  PDA software version
*#12580*369#  Software and hardware info
*#7465625#  Device lock status
*#*#232338#*#*  MAC address
*#*#2663#*#*  Touchscreen version
*#*#3264#*#*  RAM version
*#*#232337#*#  Bluetooth address
*#*#2222#*#*  Hardware version
*#*#44336#*#*  Software version and update info
*#*#273282*255*663282*#*#*     Backup all media

Testing codes

Code Function
*#*#197328640#*#* Test mode
*#*#232339#*#* Wi-Fi test
*#*#0842#*#* Brightness and vibration test
*#*#2664#*#* Touchscreen test
*#*#232331#*#* Bluetooth test
*#*#7262626#*#* Field test
*#*#1472365#*#* GPS quick test
*#*#1575#*#* Full GPS test
*#*#0283#*#* Packet loopback test
*#*#0*#*#* LCD display test
*#*#0289#*#* Audio test
*#*#0588#*#* Proximity sensor test

Configuration codes

Code Function
*#9090# Diagnostics settings
*#301279# HSDPA/HSUPA settings
*#872564# USB logging settings

Developer codes

Code Function
*#9900# System dump mode
##778 (+green/call button) EPST menu

Manufacturer-specific codes

Samsung

Samsung codes

Samsung codes
Code Function
*#0*# Access diagnostics
*#011# Network details and serving cell information
*#0228# Battery status
*#0283# Loopback Test menu
*#0808# USB Settings
*#1234# Software version/ Model details
*#2663# Firmware details (Advanced)
*#7353# Quick test menu
*#9090# Advanced debugging tools
*#9900# SysDump
*#2683662# Service mode (Advanced)
*#34971539# Camera firmware details

Xiaomi

Xiaomi Codes

 
Code Function
*#*#64663#*#*   Access test menu

Realme

Realme codes

 
Code Function
*#800# Feedback menu
*#888# Engineer mode - displays PCB number
*#6776# Software version

OnePlus

OnePlus codes

 
Code Function
*#66# Encrypted IMEI
*#888# Engineer mode - displays PCB number
*#1234# Software version
1+= (In stock calculator app) Displays 'NEVER SETTLE' on the calculator app
*#*#2947322243#*#* Wipes internal memory

Asus

Asus codes

Asus codes
Code Function
*#07# Regulatory labels
.12345+= (In calculator) Open engineering mode

Motorola

Code Function
*#*#2486#*#* Opens engineering mode
*#07# Shows regulatory information
##7764726 Hidden Motorola Droid menu

HTC

Code Function
*#*#3424#*#* HTC test program
##786# (Caution!) Phone reset menu
##3282# EPST menu
##3424# Diagnostic mode
##33284# Field test
##8626337# Launch Vocoder
*#*#4636#*#* HTC info menu

Sony

Sony codes

Sony codes
Code Function
*#*#73788423#*#* Access service menu
*#07# Certification details

Nokia

Nokia codes

Nokia codes
Code Function
*#*#372733#*#* Open service menu (FQC Menu)

Other codes 

Code Function
*#7780# (Caution!) Factory reset
*2767*3855# (Caution!) Full factory reset
*#*#7594#*#* Power off the phone
*#*#8351#*#* Activate dialer log mode
#*#8350#*#* Deactivate dialer log mode

Stay away from these codes!

Think before using!

Code Function
*#*#7780#*#* (Caution! Risk of data loss and rendering phone useless) Factory data partition reset
*2767*3855# (Caution! Risk of data loss and rendering phone useless) Format device

USSD codes for US carriers

These aren't the secret ones, but they're not so well known. USSD, or Unstructured Supplementary Service Data, codes connect to the phone's network once dialed to perform certain functions, like finding out how much credit you have left on your prepaid phone or how much data you've used this month. They change often, and the codes vary from carrier to carrier. Here are a few you can try for some of the major US carriers, along with links to more carrier-specific codes:

AT&T

  • Check your data and SMS usage: *3282#

Verizon

  • Check your data and SMS usage: #3282

T-Mobile

  • Check your data usage: #932#

Sprint

  • Check minutes, messages, and other usage stats: *4

There's a good chance you'll never need to use most of these codes, but if you do, then now you know where to find them.

Are there any secret codes that you find yourself using all the time? Or are there any we haven't listed here that are really interesting? Let us know in the comments!

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  • Jenessa Blake 5 hours ago Link to comment

    Does the network know when you use these codes??


  • Melba 3 weeks ago Link to comment

    how do i delete temp files on android samsung a10.
    my phone is telling me "too many files have been created on your phone....do a factory reset...." this is interferring with my apps and more.
    Is Factory Reset my only option??


    • Zois Bekios Zannikos
      • Admin
      • Staff
      3 weeks ago Link to comment

      How much free space does your device have? If it still has, probably resetting it would fix the bug. If you do not have enough free space, try deleting some items or bigger apps.


  • Exonica Jul 19, 2019 Link to comment

    I'm curious if doing a format would allow windows to be installed on a phone


    • storm Dec 27, 2019 Link to comment

      Nothing in this article would let you do that.


      • Justin 2 months ago Link to comment

        You are right


    • Technotechnotes Jan 29, 2020 Link to comment

      Windows as your talking about, cannot run on a phone. The architecture is completely different your phone is most likely an arm x86 or in that field and windows cannot run on that by default however there is a version of Windows built for the atom processors which are incredibly terrible in my opinion. However if you would like Linux on your phone there are plenty of ways to get Linux running on your phone


      • Darrellnterilynn Oliver 8 months ago Link to comment

        how would I install linux


      • storm 2 months ago Link to comment

        Just google the topic. Plenty of guides out there. Some of it will depend on the target phone, your technical competency and so on.


  •   25
    Deactivated Account Jul 18, 2019 Link to comment

    Thanks for the informative article 😊.


  • Brian Carr Jul 17, 2019 Link to comment

    nice useful article 👍

    Deactivated Account


  • eSparkBiz Jul 17, 2019 Link to comment

    I tried the code for mac address in my phone dialer of Samsung a50, But it didn't give me mac address. I don't know how?


    • Mark G. Jul 17, 2019 Link to comment

      These codes are generic for Android - so for instance a Google device or other devices running the Stock version of Android.
      Whilst some will work on other devices running a manufacturer version of Android, it's a hit or a miss as to what works.

      You can try searching for Samsung specific codes, though again it is not 100% certain that all of them will work. (some may be specific for the Galaxy range, or may change for different years).

      You can download apps from the Google play store that aggregate these settings to a helpful UI.

      Peace 🖖


    • Justin 2 months ago Link to comment

      I don't think any of these codes work for anything


  • Tarek Khaled Apr 6, 2019 Link to comment

    How can i type the code without having the dialer (SUMSUNG Note)


    • Mark G. Jul 17, 2019 Link to comment

      How do you make telephone calls?

      If you can't access the Mobile network or make telephone calls then it won't be possible.

      Peace 🖖


      • storm Dec 27, 2019 Link to comment

        On Huawei tablets, using these codes in the supplied calculator in Landscape orientation would work the same. I think that's specific to Huawei though. Replace # with parentheses as I recall.


    • Pat Sep 1, 2020 Link to comment

      I'm sure I'm missing something, but I'm not sure what you mean by not having the dialer. I've had several Note's and have the Note 9 now, and they have all had dialers. It's a phone.


  • Sravani Namburi Nov 19, 2018 Link to comment

    Hi this information helped me a lot nice article


  • sravan kumar Oct 30, 2018 Link to comment

    max codes not working on mi a1 oreo 8.1 Version mobile

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