Setting up your Palm as a T-Mobile phone requires that you unlock the phone using the unlock code specifically for your phone. Your unlock code can be purchased from a third-party company using the IMEI number from your cell phone. The instructions for unlocking your Palm will vary depending on the type of device you own. Once the phone is unlocked, it will be ready for use with T-Mobile.
Instructions
Unlocking Palm Treo 650, 680, Centro or Pre
1. Remove the battery's back cover and the battery.
2. Remove the SIM card. The SIM card is found under the battery.
3. Insert a T-Mobile SIM card and replace your battery and back cover.
4. Click "OK" to the "SIM not allowed" message.
5. Dial "*#*#unlockcode#" on your phone's dial pad. Your phone will display the message "SIM unlock" after resetting. Your phone is now ready to use.
Unlock Treo 600
6. Turn your phone's power off.
7. Remove the back cover and your battery.
8. Remove the correct SIM card and insert the T-Mobile SIM card.
9. Replace your battery and back cover.
10. Turn your phone's power on.
11. Enter your unlock code as "*#*#unlockcode#." You will see the message "SIM unlocked" and your phone will now be able to be used on T-Mobile.
Unlock Treo 180, 270 and 750
12. Remove the back cover and battery from your phone.
13. Remove your SIM card.
14. Replace the battery and back cover. The phone should not have a SIM card installed.
15. Turn your phone's power on.
16. Enter your unlock code using "*#*#unlockcode#." You will see the message "SIM lock removed." You can now insert your T-Mobile SIM card and active your phone on the T-Mobile network.
Tags: back cover, your phone, battery back, battery back cover, unlock code, phone power