Even though a 15.6 inches 5G smartphone or a 5G smartphone with a screen size of  15.6 inches can simulate a laptop-like experience, can simulate a tablet-like experience and at the same time can make phone calls like a 5G smartphone, it will always be constrained by hardware, software, and ergonomic differences. Having said that, for casual work, media consumption, and portability, and better visibility(Senior Citizens who have poor vision will really appreciate the  15.6 inches form factor in a  15.6 inches 5G smartphone because   watching/recording   videos and TikTok  and taking photos  and typing on a large onscreen-keyboard on a  15.6 inches 5G smartphone  is a much accurate experience and much more enjoyable)  , a 15.6 inches 5G smartphone might still be a viable option for users who don’t need intensive computing power.

P.S.  If we need intensive computing power,

            I guess, it is better to get a 5G Laptop

            than to get a 5G smartphone. In the not

            too distant future when 5G Laptop have

            telephone/phone  functionality like a 5G

            smartphone , perhaps 5G Laptop could be

            the only machine that we need to carry

            around.