As we all know Android is a highly customizable OS. On top of that, the OEM skins go a step ahead in giving additional features and customizations. One UI and Oxygen OS are amongst them that gives a lot of customization options to their users. Since Android is an open-source project and some diagnosis system needs to be built into the OS, Google has smartly baked some hidden codes inside the OS. Which anyone can access it by typing the different codes on the dialer app. Most of the codes are for the generic Androids, while some custom skins like One UI, Oxygen OS, Color OS, and more have their own set of codes as well.

Using the codes mentioned below, you can enter Samsung engineering mode, test the network, diagnose the hardware and get some vital information about your Samsung device.

In fact, in the older models of Samsung which runs on TouchWiz UI, you can even unlock your sim, in the past, people have unlocked their carrier-locked sim cards. However, by now Samsung might have fixed the hack with a software update.

Samsung Secret Codes List

So if you are having a Samsung device that runs on one UI, which means that it is released in 2017 or later. then you can try the codes mentioned below, it should work fine. Using the secret code, serial number, and IMEI number you can even check the manufacturing and activation date of your Samsung device.

Samsung Secret Code (One UI)	What does it do?
*#06#	Check the IMEI number any mobile phone or tablet
*#0*#	Test RGB (Red Blue Green), Receiver, Vibration, Touch sensitivity, Speakers, Camera Sensors, S-Pen, Audio loopback,  Software version, etc.
*#0808#	Change USB settings.
*#0228#	Check RSSI reading, Battery status ADC, etc.
*#0011#	View the GSM status information.
*#2222#	Check the Hardware Version
*#1234#	View the details of the Software such as PDA, CSC, MODEM, etc. Helps you check the BL, AP, CP, and CSC of your Samsung device
*#9090#	Check the diagnostic configuration
*#9900#	Check the Dump mode
*#12580*369#	Check Software and hardware information. This one also lets you check Samsung mobile manufacturing date.
*#0283#	Check the Audio loopback control
*#34971539#	Update Camera firmware
#7465625*638*#	Check Network lock keycode
*#2663#	Check TSP and TSK firmware update
*#272IMEI#*	Check Product code
*#272*IMEI#	Check buyer code, CSC (Country/Carrier Specific Product) Code
*#0283#	Check Audio loopback control
*#1111#	Check software version
*#34971539#	View Camera firmware menu
*43# [dial]	Enable call waiting
#43#[dial]	Turn off call waiting
*#43#[dial]	Show status of call waiting
*135#[dial]	Request own phone number (doesn’t work sometimes)
**04*[old Pin]*[new Pin]*[new Pin]#	Change device PIN. Replace the old and new PINs of your Samsung device.
*#004*[number]#	Divert call to a given number. Replace “[number]” with a phone number
*#004#	Request the status for call diversion
#004#	Deactivate call diversion
##004#	Erase call diversion

Secret Codes For Samsung Devices running TouchWiz UI

By any chance, you still have a Samsung device that was released earlier than 2017 and is still running on TouchWiz UI such as Galaxy S4, S5, S6, S7, Note 4, Note 5, Note 6, Note 7 or the Galaxy J series and C series devices. Below we have a list of codes for TouchWiz UI powered devices.

Samsung Secret Code (TouchWiz)	What does it do?
*#0*# / *#*#0*#	Test RGB (Red Blue Green), Receiver, Vibration, Touch sensitivity, Speakers, Camera Sensors, S-Pen, Audio loopback,  Software version, etc.
*#06#	Show IMEI Number
*#03#	NAND Flash the serial number
*#80#	Touchscreen noise test (warning do not press power button)
*#251#	Wakelock OFF
*#251#	Wakelock ON
*#526#	WLAN Engineering Mode
*#528#	WLAN Engineering Mode
*#745#	RIL Dump Menu
*#746#	Debug Dump Menu
*#0011#	Service Mode
*#0228#	Battery status
*#0283#	Audio packet loopback test
*#0289#	Audio/speaker-test (Melody Test Mode)
*#0514#	SysDump (System Dumps, logs, etc.)
*#0588#	Proximity Sensor test
*#0589#	Light Sensor Test Mode
*#0673#	Audio/speaker-test (same as *#0289#)
*#0782#	Real-time clock test
*#0842#	Vibration test
*#1575#	GPS Control Menu
*#2263#	RF Band Selection
*#2663#	Touchscreen FW and version
*#2664#	HW touchscreen test
*#3264#	RAM check (version number)
*#7769#	Proximity sensor test
*#7284#	Phone utility and USB driver and connectivity settings
*#7353#	Performs 12 types of function tests
*#7594#	Factory mode / Enable shutdown on long press
*#8888#	Service Mode (Read FTA hardware version)
*#9900#	System Dump Mode
*#9999#	Software versions (AP, CP, CSC, FTA SW)
*#2222#	Hardware version
*#1234#	View SW Version PDA, CSC, MODEM
*#0228#	Battery diagnostics
*#9090#	Service Mode
*#301279#	HSDPA/HSUPA Control Menu
*#4238378#	GCF Configuration
*#197328640# or *#*#197328640#*#*	Enabling test mode for service activity (also shows the manufacturing date of Samsung devices)
*#232331#	Bluetooth test
*#232337#	Bluetooth address
*#232338#	WLAN MAC address & PS mode
*#232339#	WLAN Engineering Mode test (TX & RX modes) (same as *#526*)
*#8736364#	Opens OTA update menu
*#7412365#	Camera firmware standard (Front/Rear camera firmware)
*#7465625#	Personalization (lock status settings)
*#22558463#	Reset Total Call Time
*#12580*369#	Main Version (AP, CP, CSC, RF cal, HW revision)
*#3282*727336*#	System and storage information, and Data usage statistics
* 2767 *3855#	Wipes Samsung phone completely
*#*#7780#*#*	Resets your phone to the factory state and deletes only apps and app data. You don’t need to boot into the Samsung recovery mode to do that.
*#*#7594#*#*	Enables direct power off without showing Power Menu when you hold the Power button
*#*#232338#*#*	Displays Wi-Fi MAC address
*#*#4986*2650468#*#*	PDA, Phone, Hardware, RF Call Date (or manufacturing date) firmware info
##778 [dial]	View the EPST menu

Final Words

So this was a long list of all the secret codes which you can try and run on your Samsung devices, either running on One UI or TouchWiz UI. All you have to do is open the dialer app on your smartphone and dial the codes mentioned above. You may copy and keep them or bookmark this URL for the future. These codes might come in help when needed.