| 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 |
HTC CODES
