used to be a hard-coded redirect to English, except for the users in the Zero program. We now have an ability to have complex redirection for that domain. How do you think should behave?

We could redirect m. to ...
* the current, which seems to work pretty well on the smaller device screens
* send users to the main page of the user's default language - based on the browser settings (Accept-Language header) - and later possibly even based on user's own language prefernces
* ...

Obviously it should be similar for other projects like wikinews, etc.

I am not a big fan of building a full blown page at the m. URL, as that would involve much more work without a clear benefit - there are already www and main pages available, why build another one.