MonoX relies on jQuery mobile to support all "A grade" browsers on mobile devices. At this stage, jQuery Mobile works on the vast majority of all modern desktop, smartphone, tablet, and e-reader platforms. In addition, feature phones and older browsers are also supported because of their progressive enhancement approach.
The visual fidelity of the experience is highly dependent on CSS rendering capabilities of the device and platform so not all A grade experience will be pixel-perfect but that’s the nature of the web. jQuery mobile will be adding additional vendor-prefixed CSS rules to bring transitions, gradients and other visual improvements to non-WebKit browsers in future releases.
More details on the mobile platform support can be found here