Here are some working Dialer codes. You can use these on unrooted phones. If you know of any extra please post them as well. I originally wrote these on another forum but that forum died so Im copy and pasting here
Copy the kernel logs to your SD card (helpful on unrooted phones)
*#9900#
Battery voltage and charge amperage. The temperature is the real raw value from 0-255, realize that all the temp readings you see on your phone are about 30C low
*#0228#
Hidden Menu Enabler. This is supposed to allow you to access new menus but all of the known hidden menus I have tried crashed. (Needs SPC)
*#22745927
LCD Test which includes the proximity sensor and the camera among other things
*#0*#
Debug Menu has many diagnostic and settingsincluding another way to switch between CDMA and LTE mode (Needs SPC)
**33284
Serial connection Mode. If you put it into USB-LTE mode then the computer doesnt see it. USB-Modem makes a new device show up on the computer which has no drivers
**87284
DataCreate shows the number of calls (sent receive missed) and messages
*#3282*727336*#
RTN shows information like total data transfered, original activation date and other stats
##786#
GPS reset (Needs SPC)
##4772579#
Copy the kernel logs to your SD card (helpful on unrooted phones)
*#9900#
Battery voltage and charge amperage. The temperature is the real raw value from 0-255, realize that all the temp readings you see on your phone are about 30C low
*#0228#
Hidden Menu Enabler. This is supposed to allow you to access new menus but all of the known hidden menus I have tried crashed. (Needs SPC)
*#22745927
LCD Test which includes the proximity sensor and the camera among other things
*#0*#
Debug Menu has many diagnostic and settingsincluding another way to switch between CDMA and LTE mode (Needs SPC)
**33284
Serial connection Mode. If you put it into USB-LTE mode then the computer doesnt see it. USB-Modem makes a new device show up on the computer which has no drivers
**87284
DataCreate shows the number of calls (sent receive missed) and messages
*#3282*727336*#
RTN shows information like total data transfered, original activation date and other stats
##786#
GPS reset (Needs SPC)
##4772579#