Analytics/Archive/Mobile metrics
Mobile pageviews are available from Pageview API: https://wikitech.wikimedia.org/wiki/Analytics/PageviewAPI
Unique Devices are vailable from Unique Devices API: https://wikitech.wikimedia.org/wiki/Analytics/Unique_Devices#AQS_API
Browsers: https://analytics.wikimedia.org/dashboards/browsers/#mobile-site-by-os