Can moble devices and tablets use HBM ram? It barely uses any

Again, yes. Any IC can utilize HBM if its designed for it.
With the appropriate memory interface on die, and interposer on the package you could feed it with HBM.

>>56326113
Thats what I was thinking, with then getting as big as they are and their cost you think they will start using HBM ram in moble devices and tablets to have them catch up with desktops but they don't.

>>56326172
>catch up with desktops
With phones being chained slaves of the Internet and "cloud" drives, as well as a SEVERE lack of control and efficiency, there's no "catching up", there's mobile uses and desktop uses, both will likely become extremely overpowered for consumer uses (or extremely underpowered, for consumer pockets)

>>56326215
Lag and bad/no wifi/4G spots will like to have a word with you.

>>56326172
You wouldn't use HBM unless you absolutely needed the bandwidth. Products aren't about seeing what hardware you can shove into something, they're designed with a specific price point and selling point in mind.
Other forms of memory are cheaper, so even if they offered less bandwidth, a manufacturer would use them over HBM unless that bandwidth was absolutely critical to device function.

>>56326249
In this day of age more bandwidth the better.

>>56326274
Unused bandwidth does literally nothing. An 8 lane highway with no traffic doesn't let anyone get where they're going faster.

>>56326306
With moble gaming the way it is, it needs to catch up with desktop gaming.