Mobile have become a common thing now a day but it is expensive and maximum chances are there it may get stolen.

Here's the freeware Gaurdian
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Guardian is the new antitheft system for Symbian Series 60 devices.
Every time you switch on your mobile telephone, Guardian proceeds with authentication of the inserted sim card; if authentication fails, Guardian send a notification sms message to a previously set telephone number. In addition, the system features remote control functions, i.e. deleting your photographs/phone book/text messages/video/audio data in case of loss or theft of your mobile phone

you can download and use it for free !

read on weindex.blogspot.com/2009/01/mobile-anti-theft-software-freeware.html

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