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Analogue phones could also be listened to on some radio scanners. Although more recent digital systems (such as GSM) have attempted to address these fundamental issues, security problems continue to persist. Vulnerabilities (such as SMS spoofing) have been found in many current protocols that continue to allow the possibility Conclusion Write your Dissertation How to Writing: eavesdropping or cloning. It should be noted that on a technical level, CDMA is more secure then GSM and TDMA. This is due to the fact that all calls are separated onto their own channel and encoded with a unique encryption code. 1 In all though, digital is much more secure then analog systems. Location tracking using mobile phones is also a concern. Mock-up of the "portable phone of the future," - a 60s Bell System. ad shows a portable uncannily like a modern mobile. Since 2002 there has been an enormous increase in academic research regarding the social impact of mobile phones. Books include: Agar, Jon, Constant Touch: A Global History of Thesis Now Complete Your Masters Mobile Phone2004. Glotz, Peter & Bertsch, Stefan, Dissertation | a Preperation synopsis Jos Writing. Thumb Culture: The Meaning of Mobile Phones for Society2005. Katz, James E. & Aakhus, Mark, eds. Perpetual Contact: Mobile Communication, Private Talk, Public Performance2002. Kavoori, Anandam & Arceneaux, Noah, eds. The Cell Phone Reader: Essays in Social Transformation2006. Levinson, Paul, Cellphone: The Story of the World's Most Mobile Medium, and How It Has Transformed Everything! 2004. Rheingold, Howard, Smart Mobs: The Next Social Revolution2002. This article journal harvard student business contain original research or unverified claims. There is a great deal of active research and development into mobile phone technology that is currently underway. 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