The wave phase difference is a fundamental property that characterizes the relative behavior of transmitted waves. It plays a crucial role in wave analysis and understanding various wave phenomena which could accommodate when designing the wireless link as well as a variety of applications in signal processing, optics, and acoustics. This study explores the concept of phase difference significance using high frequencies such as 1, 2.4, 10, and 20 GHz to offer a willingness to the upcoming era. We review existing phase difference models and their shortcomings, emphasizing the need for greater accuracy and precision in quantifying phase differences. The result shows that 1 GHz is the lowest phase difference among others. However, the constructive signal could be accommodated and provide a better link build-up. Overall, Addressing the importance of phase difference in GHz and identifying the signal attitude would offer contributes to the advancement of wave analysis and encourages further exploration in this domain.