I uninstalled wpsupercache still cannot switch between desktop and mobile so just disabled the option to choose in Advanced settings since users can choose on their devices/phones.
Still waiting for what I really need a answer to the question above which has no mention anywhere in support forums.
I know wptouch has user agents, should those be set to be rejected in cache? or only for not caching mobile?
Wpsupercache has also the mobile support tick box and plugin helper for wptouch.
Should both be used or which one if not?