According to reports 5G promises speeds which would be about 10 times faster than 4G.l and It is expected to appear in smartphones in 2020.

In addition, the 5G technology is expensive, as it  will require boxes that are essentially miniature cell towers to be placed all around coverage zones. They’ll have to be put inside office buildings and homes, too, because 5G wireless frequencies are so high that they’ll bounce off walls and windows that low-frequency 4G signals easily travel through.