`*#*#7262626#*#*` – Perform a field test
`*#2263#` - If previous doesn't work.


Sadly, Samsung used to provide field test display by entering codes in keypad. **However, from Galaxy S3 onward, the service mode *#*#197328640#*#* was disabled.** Only *#0011# is still available.  The worst is that even the android default testing info *#*#4636#*#* was disabled as well
And just because this looked very sparse, here's a big list!


For IMEI Number: *#06#  <br>
For RAM Memory version: *#*#3264#*#*<br>
For FTA SW version: *#*#1111#*#*<br>
For FTA HW version: *#*#2222#*#*<br>
For Touchscreen version: *#*#2663#*#*<br>
To test Bluetooth: *#*#232331#*#*<br>
To display Bluetooth Physic Address: #*#232337#*#<br>
To test secret GPS: *#*#1472365#*#*<br>
To test other GPS:  *#*#1575#*#*<br>
To test WiFi/Wireless LAN of phone: *#*#232339#*#* or *#*#528#*#* or *#*#526#*#*<br>
To display Wi-Fi MAC Address: *#*#232338#*#*<br>
To test Vibration and Back-light of device: *#*#0842#*#*<br>
To test Proximity/Distance Sensor: *#*#0588#*#*<br>
To test Touchscreen: *#*#2663#*#*<br>
For Audio Test: *#*#0289#*#* or *#*#0673#*#*<br>
To launch Service Mode: *#*#197328640#*#*<br>
Hidden Service Menu (Motorola Droid): ##7764726<br>
Field Test: *#*#7262626#*#*<br>
To format the phone: *2767*3855#<br>
To Restore Factory Settings: *#*#7780#*#*<br>
To create Immediate backup of your multimedia files: *#*#273282*255*663282*#*#*<br>
To display Phone Information: *#*#4636#*#*<br>
To get detailed Camera Information: *#*#34971539#*#*<br>
For Software & Hardware Information: *#12580*369#<br>
To display HSDPA/HSUPA Control Menu: *#301279#<br>
To start GTalk Monitoring: *#*#8255#*#*<br>
To get PDA, Phone, H/W and RF Call Date: *#*#4986*2650468#*#*<br>
Displays Build Time and Change List number: *#*#44336#*#*<br>
Packet Loopback Test: *#*#0283#*#*<br>
LCD  Display Test: *#*#0*#*#*<br>
Enter Service Menu (on New Phones): *#0*#<br>
Diagnostic Configuration: *#9090#<br>
USB Logging Control: *#872564#<br>
System Dump Mode: *#9900#<br>
View Phone Lock Status: *#7465625#<br>
Executes Emergency Dial Screen to unlock PUK Code: **05**#<br>
Enables Voice Dialing Logging Mode: *#*#8351#*#*<br>
Disables Voice Dialing Logging Mode: *#*#8350#*#*<br>
Change behavior of Power button: *#*#7594#*#*<br>