You are downloading the Tether-X XAP file v220.127.116.11 for Windows Phone. Tether-X is a free and useful Productivity app: Tether-X helps you turn your phone into a Wi-Fi hotspot. By configuring a few settings in your computer, you can take advantage of the big screen to ... You can now download the offline XAP file to install & try it.
Download Locations for Tether-X 18.104.22.168 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 Tether-X XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.