Introduction
The invention of mobile phones aimed at developing gadgets that could connect wirelessly to the public network. Communication through radio calls started some decades ago and was popular even during the 2nd World War. However, the use of wireless, portable, devices that can connect to a standard telephony network is much recent. Ideally, the first handheld telephone was launched by Motorola in 1973 (O’Shea, 2009). The first wireless, handheld gadgets were hardly portable, had a short talk time and took long to charge fully. Evidently, the first devices were less efficient compared to modern mobile phones. Various engineers ...
