In the 1990s, GSM emerged as a cutting-edge technology that promised improved
services, mobility, security, and increase in the revenues of companies through
improved, secure communication for business transactions. The practical
experience, however, has shown global subscribers and companies that mere
technological excellence of GSM has not resulted in its success. This paper has
been carried out to analyse the existing GSM subscriber activities in both
personal and business worlds by implementing a customized GSM baseband protocol
stack on a phone. The paper encompasses the tasks of analysing the prevailing
GSM insecurity, establishing a conceptual design towards the findings revealed
in the practical personal and business environments and knowledge gathered from
the literature.

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