I have a freaking cool, useless idea, but i dunno if it will actually work

1. Put a usim in the slot
2. Reads information and connects with ISP
3. Turn on mobile data
4. Turn on hotspot
5. And useas a portable wifi

Don't ask me why you don't bring my phone, there are reasons

The os will be no screen only physical buttons with stripped down aosp

Can it work? Or in other words, is it possible?