Hi,
Thanks for all your votes on this suggestion guys!
Version 6.0 includes a new responsive template for use on mobile devices. We also added responsive elements to the admin area so can be used on phablets in landscape view. However the admin area simply contains too many options to be practically managed on a smartphone
We do have apps which contain the core features needed for managing your business on the move:
http://www.iwhmcs.com
http://www.awhmcs.com