Abstract: The relative effectiveness of Information Communication Technology (ICT) and its consequences in this fast-changing world was endless. This paper investigates mobile phone, It usage, proficiency and it’s constrain in Nigeria. Global System for Mobile Communication (GSM) has brought tremendous changes in individual way of life and societies in general where people who stay far from one another can easily link together with wireless phone. A mobile phone also called mobile cellular telephone, or cell phone can be regarded as an electronic device used for two-way radio telecommunication over a cellular network of base stations known as cell sites. Most mobile phones provide voice communications, Short Message Service (SMS), Multimedia Message Service (MMS), and provide Internet services such as Web browsing and email etc. It promotes significant benefit to education, business transaction and social life in general. While on the other hand it contributed a lot toward spreading anti-social act, immorality and ill health to some extent etc. An official statistic by Nigerian Communication Commission (NCC) revealed that there are about 150,660,631 active mobile phone connections in Nigeria as at the end of third quarter 2015. Uses of mobile phone good or bad are two side of a coin. Every good thing when abuse can be harmful, so it is with mobile phone. Minimizing the amount of time spent using mobile phone, speaker mode use or a headset use and public awareness on proper cell phone use pattern would help toward having optimally benefited from having mobile phone.