Hello Robin, I received a Palm Treo 755p from my son. He is on Sprint, I am on a regional carrier that uses the Treo 755p. I am trying to unlock the Treo 755p. I have tried the *#06# with no luck. The IMEI number isn't behind the battery. Can you please tell me how to find the IMEI number or how to unlock? I would appreciate it so much. Thank you.