Model : Treo 180 & 270

1 - Switch ON your phone without SIM Card,
2 - Compose : *(star)#*(star)#CODE#

Model : Treo 600

1 - Switch ON your phone with Allowed SIM Card,
2 - Go to Menu and select "Phone Tool" or "Phone Application"
3 - Type on Virtual Keyboard *(star)#*(star)#CODE#
4 - Select with PEN "Numer" and phone will show that's unlocked now !

or

1 - Switch ON your phone with a not Allowed SIM Card,
2 - Enter the Unlock Code we send to you.