The fact that nobody thought of a three folded phone yet is a mystery to me. One would have a properly sized tablet when folded out and could use one display a

The fact that nobody thought of a three folded phone yet is a mystery to me. One would have a properly sized tablet when folded out and could use one display as front screen when folded in. The only issue would be that the front screen may be curved on one side but not on the other.