JetPack is nice plugin. But I am facing problems with Mobile theme. My page is using WPML so it is multilanguage site.
The issues are:
1. when you access EN version http://www.triparoundtheworld.eu from mobile device then Full Site appear at first. But the Mobile theme should appear at first!
2. when you access CZ version http://www.nasecestakolemsveta.cz/ then it is loaded in mobile theme, which is Ok against EN version of site, but when you click on View Full Site in the footer then it will open in mobile theme once again. Basically I can not get to Full Site page :-(
Please have a look on it!