It doesn't seem to support .delegate() or .data() though, so you would probably have to shim these (and probably a couple of others that I forgot) yourself.
edit: Looks like JQ.Mobi does support .data() anyway: https://github.com/appMobi/jQ.Mobi/blob/master/jq.mobi.js#L3...
The developers are the ones who know what functionality is replicated and what isn't- going through myself and testing seems like a huge waste of time.
Not really, just run the Backbone test suite and substitute jQuery/Zepto with JQ.Mobi. It shouldn't pass straight away because I'm pretty sure that JQ.Mobi is missing a couple of the functions required by Backbone (see my post a couple of levels up) but it probably wouldn't be a huge deal to write them yourself.