Achenstrasse

I have an NX300h & whilst i love the car I loath the infotainment Unit & in particular the Sat Nav which is without doubt the worse I ever come across. It's such a pity. I've seen online videos about replacing the Head unit with a Carplay Android one that provides google maps & all sorts of other goodies however I can't seem to find out which units are best (& which to avoid). Has anyone experience of having the head (display unit changed) & which unit they bought. I've got an auto electrician ready to fit it but he's waiting for me to buy the unit. Any advice very gratefully received

Is it possible to programme key fob so I can open the boot on my nx300h without having to open all of the doors first? When I press the boot lid button the boot will not open. I have to open all of the doors using the fob before it will let me open the boot. Surely this can't be right as it poses security issues. I've looked in the manual and on line and can't find how to programme the remote fob so that I can open the boot in isolation- ie keeping the other 4 doors locked. Can anyone help me on this please?