Go to: General Configuration > Find new add-ons
Search for: Refined Mobile
Click on: Free Trial or Buy now button
Disable bundled Confluence Mobile Plugin like this: Disable the default Confluence mobile plugin. Doing this will improve the user experience.
Accessing Confluence on a mobile device should automatically load the Refined Mobile interface. If you want to visit the mobile interface on any browser, point your mobile browser to: yourdomain.com/m.