You are downloading the Who's on TS3 XAP file v22.214.171.124 for Windows Phone. Who's on TS3 is a free and useful Productivity app: See who is online on your TeamSpeak 3 server!Now you can query your TS3 server(-s) from your windows phone.More help on the ... You can now download the offline XAP file to install & try it.
Download Locations for Who's on TS3 126.96.36.199 XAP file
Important Notice: Now Due To Unspecified Limitations, You Can Not Use The Offline XAP File To Install It Any More.
To try to install it manually from an SD card, you should choose one of the server location above to get the offline Who's on TS3 XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.