It would be nice if we had more information. But you can forget it.
The current design is not final. It is possible that changes in the size slightly. At least that was somewhere in the conversation, for example, that the screen edges are less.
There is a video where you can see the rear of the prototypes (without cover). You see nothing but a black area. Not even the main battery is visible. Therefore, we are left with all non other than to wait until Jolla / manufacturer has the Smartphne Developed completely and then gives us then the data here.