See http://www.office.com/information for applicable devices. Internet connection required. Internet and mobile telephone usage charges may apply.  Application availability and features vary by platform and device. Publisher, Access, and OneNote available on PC only.  Windows 7, Windows 8, or Windows 8.1 OS required. Internet connection required.  Skype account required. Excludes special, premium and non-geographic numbers. Calls to mobiles are for select countries only. Skype world minutes not available in all countries. See the FAQ for details.  Each additional person you share your subscription gets 1TB of OneDrive storage.