If you want to read or edit a talk page you actually need to search for the title of the talk page (e.g. "Talk:Android" and click "Talk:Android_(operating_system)"). It would be better to have a link/button at the end of an article (or in the menu under "Font and theme") which takes you directly to the talk page.
See also: T54165: Links to talk pages in mobile view for all anonymous users