Free software to detect who has stolen your mobile phone.

Every body wants to protect there mobile phone from being stolen. If your mobile handset is a costly one, then chances are more that your mobile may get stolen. When your mobile gets stolen you have to wait for the police if they can luckily recover your stolen mobile. The thief quickly replaces your SIM card with his own, so you can't call at your own old mobile phone number and can't locate where it is.
Fortunately , Mobile anti-theft software comes in very useful in situations like this. If you have installed a mobile anti-theft software in your phone, then when the phone is stolen and the thief removes your SIM card insert a new sim card of his own, immediately the software sends an sms to your selected number notifying that your sim card is removed and the number, location of the new sim card.
The whole operation goes like this
1) You have a mobile phone with your own phone number say "1111111111".
2) Now you install the mobile anti-theft software in your phone.
3) You select your sister's mobile phone number say "2222222222" as the number where the software should send sms when your sim card is removed.
3) Your mobile phone is stolen (I hope this does not happen really) by a thief , he then removes your sim card ("1111111111") and inserts his own sim card (say "3333333333").
4) Now the software immideately detects this change of sim card and secretly send an sms to your sister's number ("2222222222") with information of the replaced sim card number ("3333333333") and the possibly the location of this new sim card number.
5) Every time the thief inserts a new sim card the software will send sms to "2222222222" telling you the number of the new sim card inserted.
Now, you can tell this information to the police or chase the thief yourself(if you know Kung Fu
or can fire bullets like James Bond, the software is not going to help you in this).
The software sends the information sms secretly so that, the thief does not get aware of the fact that the "Big Brother" is always watching his footsteps secretly.

Now comes the name of the softwares that can do this and for free.
Guardian 2.1
Most populer software to do this is the Guardian 2.1. You can download a free version of this software can be downloaded from
guardian-mobile.com or Download.com
The software can only be used with mobile phones woth symbian os support, like Nokia models like the 6600, 7610, 6630, 6670, N 70, N 72, N 80, N 93, N 95 and other mobile makers with symbian support.
mGuard
You you want a similer software for your Sony Erricsson phone , then you have to use a software mGuard , which can be freely downloaded from dexmobile.com
Anti Theft Alarm v1.0 - J2ME
If you want a java version of this kind of software then you can use
Anti Theft Alarm v1.0 - J2ME . Which Can be downloaded from
momcell.com or mobile9.com