This document describes a sniffer device and software for detecting and locating lost mobile phones. The sniffer works by increasing its transmission frequency to connect directly to the lost phone's IMEI number. The software inputs the IMEI and checks for signaling information from the lost device. It then displays the location and device details to help recover the lost phone. The goal is to design precise yet small sniffers and software to efficiently track lost mobiles.

2. Introduction
• The main scope is to detect the lost mobiles
•For the detection of lost mobile SNIFFER
plays a vital role
•The sniffer device has to be designed precisely
and size should be reduced for easy mobility for
the purpose of detection

3. What a SNIFFER is?
The sniffer is basically a transceiver that
works in the frequency which is in the
special unused range that is operated by the
service provided or it can designed to
operate at a frequency that is of much
different frequency than the one that is
being used

4. SOFTWARE FOR THE TRACKING
• The software part plays a major role in the
tracking of the lost mobile phone.
•The mobile phone that is lost has certain
IMEI number that is embedded in the chip
•The software that is to be designed in such a
way that the software has the input as the
IMEI number of the lost mobile phone

5. •After getting the input of the lost mobile
phones IMEI number it checks the comport
for getting the information
•It checks whether it obtains any signaling
information from the lost device that might
respond to the signal sent by the sniffer

6. Working of sniffers
The working of sniffers is of two phases:
Before Sniffer increases the frequency
After Sniffer increases the frequency

7. Before Sniffer increases the
frequency
•By default Mobile devices always
connects to the BTS(Base Station) and
MSC(Mobile Switching Center).
•Now the sniffer increases the
frequency and amplitude.
•As shown in the figure in the next
slide

8. Before Sniffer increases the
frequency

9. After Sniffer increases the frequency
•So, only the particular user with the IMEI will
be connected to the particular frequency.
•The other mobile devices of the surroundings
will not be connected.
•As shown in the figure in the next slide

10. After Sniffer increases the
frequency

11. From the above figure we have clearly observed the
tracing of the lost mobile.
We have identified the lost mobile using IMEI.
But,
The location where it is present can be known by
seeing at the output of the software.
Which depicts and retrieves the details of the lost
mobile as shown in the next slides.

12. GUI snapshot of MAC
table

13. GUI snapshot of packet table of
MAC

14. CONCLUSION
•The idea of development “Sniffer for the
detection of lost Mobile phones” paves a
way by means of which the lost mobile
phones can be recovered.
•Let all of us hope for the advancement of
the technology in this domain.
•Which will be very helpful for each and
every persons who are lost mobiles.