said 7 months, 3 weeks ago:
I personally believe (and hope) that Facebook will launch mobile version of tabs soon. The mobile app is almost ready for it. The Timeline for Pages in mobile app was launched just a few weeks ago. In last few months they were focusing on rewriting the mobile app from HTML5 to native iOS code to make it faster and now they are working on native app for Android to make it faster too.
Then more new features should appear in mobile app
But in the meanwhile you can use some kind of “smart URL” which will direct desktop users to the normal tab and the mobile users to the mobile version of the promotion – the ordinary mobile web. Then you simply share this url instead of the Tab url.
I think that GroSocial and NorthSocial have this smart URL feature for their promotions. You can also develop it on your own, it’s not so hard. Let me know if you need to know more.