Hi Osa,
>> From my work in NT7 it wasn't. But, jquery themes can be fully responsive.
Up to NetTalk 9 there were still quite a few layouts based on <table> structures, and this can make responsive design tricky.
From NetTalk 10 there are settings, global and local, which let you use a DIV based layout instead of a Table based layout.
This means that, with the right CSS, the app is "fully responsive".
I haven't done too much on the CSS side yet - the "base" theme is probably the best one if you want to work with responsive layouts - but of course you are free to tweak the CSS however you like. By default I do things like turn "horizontal" forms and browses into vertical ones (when the screen is small) and so on.
I expect to updates the various other themes as time permits.
cheers
Bruce