Have you looked into Sprite software called Terminator?
Key Features
- Locate your phone using GPS - See exactly where your phone is and track it on via Google Maps, or Virtual Earth.
- Set and Forget – Once configured, Sprite Terminator is unobtrusive and can only be uninstalled with the correct password
- Remote Delete – Send an SMS message to initiate the wipe operation including all external storage cards
- Remote Lock-Down – Send an SMS message to lock all functionality or re-set the device master password
- SIM Change Alert – Receive a notification SMS message if the SIM card has been changed
- Activity Retrieval – Send an SMS message to retrieve call log entries
- Supports all Windows Mobile 5 & 6 Phones