CHAPTER 31

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1. You can obtain the GSM codec software from the Web site kbs.cs.tu-berlin.de/~jutta/toast.html.

2. You can obtain the details of the GSM standard at http://www.3gpp.org.

3. You can obtain the details form http://www.qualcomm.com.

4. When a mobile phone is lost, the first thing to do is to call that number and check whether it is ringing. If the thief is using the mobile phone without removing the SIM card, the operator can trace approximately, but not precisely, where the thief is located. However, the operator can disable the phone so that both incoming and outgoing calls be barred. The GSM standard provides another feature using which lost mobile phones cannot be used. If the IMEI is registered with the operator, then the thief cannot use the mobile phone.

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