$1.$ Time delay can affect data communication more seriously than voice communication$\mathrm{.}2.$ Digital twins means a physical product has an IT$-$enabled virtual shadow which acts as the avatar of the physical product and can be processed digitally$\mathrm{.}3.5$G$,$ or the so$-$called air fiber, differentiates from early generations of cellular communications technologies mainly in speed. $4.$ WiFi is a kind of mobile telecommunication technology$\mathrm{.}5.$ If a $4$G$-$connected handset and a $5$G$-$connected hand have the same$-$sized screens, then these two handsets have the save information richness.