Skype for Business is available as a free app for Android, iOS and Windows Phones.
Simply access the app store on your phone and search for 'skype for business'. If you are accessing this page via your phone or tablet, you can follow the relevant link here.
Important! Please note that we cannot offer technical support for these apps as they are updated directly from Microsoft. We are not responsible for any missing features or future changes to the apps. We recommend that you refrain from using the Skype for Business app for phone calls, but only use it for instant messaging and presence.