Given this article:
http://www.infoq.com/news/2014/03/angular-2-0
Angular 2.0 will support Opera but does not mention Opera Mini. I suppose that means there will not be support but would like some confirmation before writing off what would otherwise be a wonderful framework for us.
Background: I'm developing for the East Africa region where Opera Mini can compose over 80% of traffic in some countries.
On
Angular still doesn't have support for proxy browsers (Opera Mini, Uc Browser). Have tried server side rendering with Universal but to no avail. As suggested by Erik Honn, your best bet is going with a Server rendered app
The specs have been updated since that article (I think they now go down to IE9), but Opera Mini has really shoddy javascript support so using any client-side framework for it is a bad idea. They may work since they do have some support, but don't count on it.
In general, if 80% of your users are on opera mini, don't use a SPA. In fact, you may want to avoid javascript completely, using something like Django would be a much safer option and it would probably result in a smaller page for the user to download (and saving on data is one of the prime reasons people use Opera mini).