The talk button on the Minerva skin is currently only visible to logged-in users whom have greater than 5 edits, or logged-out users who have opted-in to the beta setting. This differs from desktop which shows it unconditionally.
Original task report:
The mobile interface for wikipedia currently doesn't offer a link to the Talk/non-Talk page. Nor does it offer a clear link to the History page.
Request: add a thin set of tabs at the top of the page, as on the non-mobile interface. Include at least "Article/Project" "Talk".
Either offer a "History" tab (which would take you to the non-mobile interface, as currently), or move up the "last edited X days ago" line to be a subtitle, just below the title. If the latter, add the text "(see page history)" to make it clear that clicking on that text will display the history page.
This will make editing and interacting with the site via mobile much more rewarding. Thanks!
See Also:
This card tracks a proposal from the 2015 Community Wishlist Survey: https://meta.wikimedia.org/wiki/2015_Community_Wishlist_Survey
This proposal received 6 support votes, and was ranked #79 out of 107 proposals. https://meta.wikimedia.org/wiki/2015_Community_Wishlist_Survey/Talk_pages#Access_talk_pages_in_the_mobile_interface_from_main_article
Developer notes
Removing this logic would actually throw away a lot of code debt.
SkinMinerva has a method isTalkAllowed.
Removing this method and it's usages would show the talk button for everyone.