1. *#06# displays the IMEI and Serial Number
2. *#1234# Firmware version - you can check here your SAMSUNG Galaxy S9 Firmware Version and Model Name
3. *#7353# Test Menu - in this menu you can test following things : Earpiece, Vibration, Loud Speaker, Diming, VT Camera, TSP Dot Mode, TSP Grid Mode, Accelerometer, Proximity Sensor, Light Sensor
4. *#0*# Advenced Test Menu - in this Test Menu you can test most futures your SAMSUNG Galaxy S9 have, like : LCD Display, Touch, LED light, Front and Back Cameras and much more.
5. *#0011# Service Mode will let you check some details like Network Connection details, Serving Cell Info
6 *#2683662# - Advenced Service Mode this code gives you acces to many things in your SAMSUNG Galaxy S9 e.g. you can test things like, 2g 3g LTE WIFI etc... and also lots of things to be checked SIM Information, Antenna, All SW Version, IMEI and much much more enjoy!
7. *#0228# Battery Status - here you have every information about SAMSUNG Galaxy S9 battery.
8. *#0808# USB Settings - by this menu you can change the way your SAMSUNG Galaxy S9 will be rocognized by PC/Laptop when you connected with USB cable. Modes like Mass Storage, MPT, ADB, etc...
9. *#2663# Advenced Firmware Version menu allows you to check : TSP FW Version, Touch key FW version, MCU/BINFW Version and WIFI Version
10. *#74123465* Camera Firmware Standard - check your camera firmware version.