*#*#3424#*#* - function test Program

*#*#4636#*#* - HTC Info menu

*#*#8255#*#* - opening GTalk Service Monitor

##3424# - HTC Diagnostic mode

##3282# - for EPST

##8626337# - for VOCODER

##33284# - Field trial menu

##786# - Reverse Logistics Support

##7738# - Protocol Revision.