You are downloading the 6tag XAP file v18.104.22.168 for Windows Phone. 6tag is a free and useful Social app: 6tag is the most full featured Instagram app for Windows Phone★★★ Exclusive features ★★★- Support non-square images (upload ... You can now download the offline XAP file to install & try it.
Download Locations for 6tag 22.214.171.124 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 6tag XAP file, move the file to your phone's SD card and then tap 'Install local apps' in the phone's App list.