You are downloading the HamExam XAP file v18.104.22.168 for Windows Phone. HamExam is a free Education App: HamExam is for anyone who would like to pass the FCC Amateur Radio exams. The app covers the Technician, General and Extra question pool. HamExam ... You can now download the offline XAP package file to install & try it.
Download Locations for HamExam 22.214.171.124 XAP file
To try to install it manually from an SD card, you should choose one of the server location above to get the offline HamExam XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.