*Currently the Skype for Business Android app is in a beta stage, Microsoft said it should be released sometime in 2016. In the meantime you may use the old Lync app, however this does have a few limited bits of functionality.
Note: app requires Android 4.0 or higher
It can be download from the Google Play Store
Enter your sign-in address (for example, firstname.lastname@example.org) and your normal password, and then tap Sign In.
Enter your mobile number with country and region codes. This number is only used if a Voice Over Internet Protocol (VOIP) call is used.
Tap Next and select if you wish your University contacts to be Synced and start using Skype for Business..