Max zoom =18 ?

I wish I could.  I cannot reproduce the popup of the plus/minus scale buttons.

AFAIK the mapzoom control refers to the mapzoom only. This works okay, and the zoom is settable by code as well, no problem with it.

I see this scale-line, it's very very small on my phone.

Should this scale-line respond to a tap on it? Like popping up the scale buttons?
It doesn't respond when I tap on it. Shoud it? Maybe it's just too small to tap?