Another technological device was that cell phone. Cell phone was first used in military in Thailand. Mobile phone in the past used analog technology, which was less reliable than the digital technology that we use in today. For the size of cell phone in the past was very large that was very inconvenient to use when compared we use today, it look thin and contained many options such as touch screen and internet connection that easier to transfer information such as text, email and voice data as smart phone capability (Wolpin, 2014).