They have a special feature, which always end with a *, but start with an asterisk. you do not need to be connected to the network to activate: logic, since they act directly and Android.
In fact, they are stored in file systems and depend on the version installed on the smartphone. Many codes have become obsolete with the transition to Android 4.3 Jelly Bean. The most interesting of these is by far the information menu on the phone.
Also, keep in mind that in some codes arrival Lollipop removed, other implemented. We update the list when we get information regularly.
Note that some manufacturers are adding their bit with new codes in some of its terminals. We try to give as complete a list as possible. Over time will be updated as we will discover new codes secret
SAMSUNG CODES
| Code | Description |
|---|---|
| *#*#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:
| Code | Description |
|---|---|
| *#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# | nandflashheaderread |
| *#0808# | usb service |
| *#9090# | service mode |
| *#7284# | FactoryKeystring |
| *#34971539# | camera firmware standard |
| *#1111# | servicemode |
| *#0*# | Testmodus |
