Coders have a storied tradition of baking in secret passageways (or sometimes, just fun little Easter eggs) that can only be accessed by inputting a special "key." And so that tradition continues in the mobile age.

Unstructured Supplementary Service Data (USSD)—sometimes known as "quick codes" or "feature codes"—is an extra-UI protocol, which allows people to access hidden features. This protocol was originally created for GSM phones, but can be found on CDMA devices as well (if that's a bunch of acronym gibberish to you, here's a quick primer).

These publicly available backchannels allow users to directly communicate with their service provider's computers and/or access back-end features in their device. They are accessed by inputting them into the phone's dialer (the screen you use to start a phone call) and usually begin and end with the * or # keys with a sequence of numbers in between (there's close-to-zero chance that anyone would accidentally access them).

They're not terribly practical. Most people don't really need to know how their local cell towers are performing or what their IMEI number is (more on that later). Still, it can be fun to play around and see what unexpected functionality your phone is hiding beneath the surface.

We would LOVE to provide you with a comprehensive list of the dozens of codes out there, but note that these codes seldom work across different carriers, OSes, or phone models (or even on generations of the same model).

If you really want to try them out, your best bet may be to Google your phone's make and carrier + "USSD" for a tailored, comprehensive list. I attempted a number of codes using an iPhone SE in addition to HTC One Mini and a Galaxy S5 and Galaxy S7 Edge. Some of them worked! Check out the list below. Good luck and have fun!


Code: *#*#4636#*#*
Feature: About phone.

Code: *#*#7780#*#*
Feature: Restore factory settings.


Code: *2767*3855#
Feature: Reinstall phones firmware.

Code: *#*#34971539#*#*
Feature: About camera.

Code: *#*#7594#*#*
Feature: Changing the power button behavior. Enables direct power off.

Code: *#*#273283*255*663282*#*#*
Feature: Backup media files.

Code: *#*#197328640#*#*
Feature: Test mode for service activity.

Code: *#*#232339#*#* and *#*#526#*#* and *#*#528#*#*
Feature: Wireless LAN test.

Code: *#*#232338#*#*
Feature: Display wifi Mac address.

Code: *#*#1472365#*#*
Feature: GPS test.

Code: *#*#1575#*#*
Feature: Different GPS test.

Code: *#*#0283#*#*
Feature: Packet loopback test.

Code: *#*#0*#*#*
Feature: LCD display test.

Code: *#*#0673#*#* and *#*#0289#*#*
Feature: Audio test.

Code: *#*#0842#*#*
Feature: Vibration and backlight test.

Code: *#*#2663#*#*
Feature: Display touchscreen version.

Code: *#*#2664#*#*
Feature: Touch screen test.

Code: *#*#0588#*#*
Features: Proximity sensor test.

Code: *#*#3264#*#*
Features: RAM version.

Code: *#*#232331#*#*
Features: Bluetooth test.

Code: *#*#7262626#*#*
Features: Field test.

Code: *#*#232338#*#*
Features: Display Bluetooth service address.

Code: *#*#8255#*#*
Features: G-.talk monitoring.

Code: *#*#4986*2650468#*#*
Features: PDA, phone, hardware, RF call date, firmware info.


Code: *#*#1234#*#*
Features: PDA and phone firmware info.


Code: *#*#1111#*#*
Features: FTA software version.


Code: *#*#2222#*#*
Features: FTA software version.


Code: *#*#44336#*#*
Features: Displays build time and change list number.


Code: *#*#06#*#*
Features: IMEI number.


Code: *#*#8351#*#*
Features: Enable voice dialing login mode.


Code: *#*#8350#*#*
Features: Disable voice dialing login mode.


Code: *#*#05#*#*
Features: Execute from emergency daily scree to unlock PUK mode.

iPhone fan? Check out Secret iPhone Codes on my website https://drag.com.ng/2017/09/21/iphone-secret-codes/

great

Can you tell me anything about unlock codes?
For example, I found this guide, related to the new Note 8: http://www.androidguys.com/2017/08/28/unlock-samsung-galaxy-note-8-methods/

Is there a way of finding these unlock codes by yourself?

HarveyDeven:
Can you tell me anything about unlock codes?
For example, I found this guide, related to the new Note 8: http://www.androidguys.com/2017/08/28/unlock-samsung-galaxy-note-8-methods/

Is there a way of finding these unlock codes by yourself?

What you're saying here is completely different from secret codes...

Make person no go do the one way go blow phone one day.

I dont need these codes for my Tecno Spark co's I'm sure everything is working fine.

MarkWayne89:


What you're saying here is completely different from secret codes...

I guess you're right, thanks for clearing things!

hobyner:
Coders have a storied tradition of baking in secret passageways (or sometimes, just fun little Easter eggs) that can only be accessed by inputting a special "key." And so that tradition continues in the mobile age.

Unstructured Supplementary Service Data (USSD)—sometimes known as "quick codes" or "feature codes"—is an extra-UI protocol, which allows people to access hidden features. This protocol was originally created for GSM phones, but can be found on CDMA devices as well (if that's a bunch of acronym gibberish to you, here's a quick primer).

These publicly available backchannels allow users to directly communicate with their service provider's computers and/or access back-end features in their device. They are accessed by inputting them into the phone's dialer (the screen you use to start a phone call) and usually begin and end with the * or # keys with a sequence of numbers in between (there's close-to-zero chance that anyone would accidentally access them).

They're not terribly practical. Most people don't really need to know how their local cell towers are performing or what their IMEI number is (more on that later). Still, it can be fun to play around and see what unexpected functionality your phone is hiding beneath the surface.

We would LOVE to provide you with a comprehensive list of the dozens of codes out there, but note that these codes seldom work across different carriers, OSes, or phone models (or even on generations of the same model).

If you really want to try them out, your best bet may be to Google your phone's make and carrier + "USSD" for a tailored, comprehensive list. I attempted a number of codes using an iPhone SE in addition to HTC One Mini and a Galaxy S5 and Galaxy S7 Edge. Some of them worked! Check out the list below. Good luck and have fun!


Code: *#*#4636#*#*
Feature: About phone.

Code: *#*#7780#*#*
Feature: Restore factory settings.


Code: *2767*3855#
Feature: Reinstall phones firmware.

Code: *#*#34971539#*#*
Feature: About camera.

Code: *#*#7594#*#*
Feature: Changing the power button behavior. Enables direct power off.

Code: *#*#273283*255*663282*#*#*
Feature: Backup media files.

Code: *#*#197328640#*#*
Feature: Test mode for service activity.

Code: *#*#232339#*#* and *#*#526#*#* and *#*#528#*#*
Feature: Wireless LAN test.

Code: *#*#232338#*#*
Feature: Display wifi Mac address.

Code: *#*#1472365#*#*
Feature: GPS test.

Code: *#*#1575#*#*
Feature: Different GPS test.

Code: *#*#0283#*#*
Feature: Packet loopback test.

Code: *#*#0*#*#*
Feature: LCD display test.

Code: *#*#0673#*#* and *#*#0289#*#*
Feature: Audio test.

Code: *#*#0842#*#*
Feature: Vibration and backlight test.

Code: *#*#2663#*#*
Feature: Display touchscreen version.

Code: *#*#2664#*#*
Feature: Touch screen test.

Code: *#*#0588#*#*
Features: Proximity sensor test.

Code: *#*#3264#*#*
Features: RAM version.

Code: *#*#232331#*#*
Features: Bluetooth test.

Code: *#*#7262626#*#*
Features: Field test.

Code: *#*#232338#*#*
Features: Display Bluetooth service address.

Code: *#*#8255#*#*
Features: G-.talk monitoring.

Code: *#*#4986*2650468#*#*
Features: PDA, phone, hardware, RF call date, firmware info.


Code: *#*#1234#*#*
Features: PDA and phone firmware info.


Code: *#*#1111#*#*
Features: FTA software version.


Code: *#*#2222#*#*
Features: FTA software version.


Code: *#*#44336#*#*
Features: Displays build time and change list number.


Code: *#*#06#*#*
Features: IMEI number.


Code: *#*#8351#*#*
Features: Enable voice dialing login mode.


Code: *#*#8350#*#*
Features: Disable voice dialing login mode.


Code: *#*#05#*#*
Features: Execute from emergency daily scree to unlock PUK mode.

iPhone fan? Check out Secret iPhone Codes on my website https://drag.com.ng/2017/09/21/iphone-secret-codes/

nice