How to enter Palm Treo unlock codes

Model : Treo 180, 270, 750

1 – Switch ON your phone without SIM Card,
2 – Compose : *#*#CODE#

or

1 – Switch ON your phone with a not Allowed SIM Card,
2 – Enter the Unlock Code
Important Note : On some Models the Num Lock is not automatically enabled so make sure it is ON before entering the unlock 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 “Number” 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

Model : Treo 650/680

1 – Remove Treo battery, unplug cable
2 – Insert incorrect SIM card (1 the phone does not accept)
3 – Power on your Treo, “Sim not allowed” is displayed, click “ok”
4 – Go to the dial pad, and use the stylus to enter code *#*#CODE#. Then press “Dial”
5 – Phone will reset and display “sim lock removed”

Ensure you enter the codes in this manner *#*#CODE# (e.g. *#*#12345678#)

Troubleshooting:

Error Message: “The SIM Lock has NOT been removed from this phone”

Solution 1: Please make sure you are entering the correct code and enter it using this method *#*#CODE# dial

Solution 2: If the phone says that the SIM lock has not been removed, ensure that the phone radio (wireless mode) is on.