You are downloading the vxUtil AppX file v126.96.36.199 for Windows Phone. vxUtil is a free and useful Productivity app: vxUtil is a suite of network/internet (IP) utilities. These utilities allow you to perform network related trouble-shooting and other ... You can now download the offline AppX file to install & try it.
Download Locations for vxUtil 188.8.131.52 AppX file
Note: To install it manually from an SD card, you should choose one of the server location above to get the offline vxUtil AppX file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.