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LIST OF ANDROID SECRET CODES AND TRICKS

Dear blog fans here is the list of important codes which are helpful and important to understand for any smartphone user. It may happen one day you get difficulties in using your phone hence you may try one of the following codes which may be suitable for your problem. For any question you may ask at the end of this post.

Note: The codes are written based on the type of smart phone. But some codes can be used in other phones which are not mentioned below, like HUAWEI, STARTIMES, ITEL and others, provided that they are using ANDROID operating system.

 SAMSUNG CODES
CodeDescription
*#*#4636#*#*

Display information about Phone, Battery and Usage statistics
*#*#7780#*#*Restting your phone to factory state-Only deletes application data and applications

*2767*3855#It's a complete wiping of your mobile also it reinstalls the phones firmware

*#*#34971539#*#*Shows completes information about the camera

*#*#7594#*#*Changing the power button behavior-Enables direct poweroff once the code enabled

*#*#273283*255*663282*#*#*For a quick backup to all your media files

*#*#197328640#*#*Enabling test mode for service activity

*#*#232339#*#* OR *#*#526#*#*Wireless Lan Tests


*#*#232338#*#*Displays Wi-Fi Mac-address


*#*#1472365#*#*For a quick GPS test


*#*#1575#*#*A Different type GPS test
*#*#0283#*#*
Packet Loopback test

 *#*#0*#*#*
LCD display test

 *#*#0673#*#* OR *#*#0289#*#*

Audio test
*#*#0842#*#*Vibration and Backlight test

 *#*#2663#*#*		Displays touch-screen version

 *#*#2664#*#*		Touch-Screen test

 *#*#0588#*#*		Proximity sensor test

 *#*#3264#*#*		Ram version

 *#*#232331#*#*		Bluetooth test

 *#*#7262626#*#*		Field test

 *#*#232337#*#		Displays bluetooth device address

 *#*#8255#*#*		For Google Talk service monitoring

 *#*#4986*2650468#*#*		PDA, Phone, Hardware, RF Call Date firmware info

 *#*#1234#*#*		PDA and Phone firmware info

 *#*#1111#*#*		FTA Software version

 *#*#2222#*#*		FTA Hardware verion

 *#*#44336#*#*		Displays Build time and change list number

*#06#		Displsys IMEI number
*#*#8351#*#*Enables voice dialing logging mode

*#*#8350#*#*		Disables voice dialing logging mode

##778 (+call)		Brings up Epst menu

 HTC CODES

Code		Description

*#*#3424#*#*		HTC function test Program.

*#*#4636#*#*		HTC Info menu

*#*#8255#*#*		launching GTalk Service Monitor

##3424#		Diagnostic mode.

##3282#		for EPST.

##8626337#		for VOCODER

##33284#		Field trial menu.

##786#		Reverse Logistics Support.

##7738#		Protocol Revision.

##775#		Unknown


##2539#		Unknown
One more hidden menu trick go to market download gesture (free app)
Open gesture press menu
Press settings
Enable (check) settings
Write the following in gesture: 4g
Also note writing: Sprint
And writing: settings
/u/norf9: For the s4 I found these codes:
CodeDescription
*#1234#to check software version of phone.

*#12580*369#		to check software and hardware information.

*#0228#		Battery status (ADC, RSSI reading)

*#0011#		Service Menu

*#0283#		loopback test

*#06#		imei

*#03#		nand flash header read

*#0808#		usb service

*#9090#		service mode

*#7284#		Factory Key string

*#34971539#		camera firmware standard

*#1111#		service mode

*#0*#		Test modus
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