Model : Treo 180 & 270
1 - Switch ON your phone without SIM Card,
2 - Compose : *#*#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 *#*#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.