The Sprint version is the RAPH800:
https://fjallfoss.fcc.gov/oetcf/eas/...#39;NM8RAPH800'
Note the confidentiality request - the items that can be kept confidential only until the release date are requested to be held confidential until 10/19 for the RAPH800.
FYI - here's the link to the Diamond version of the page where you can see links for the internal photos and user manual:
https://fjallfoss.fcc.gov/oetcf/eas/...#39;NM8DIAM500'
Also, NM8 is the FCC ID for HTC in case you want to look up all of HTC's phones that have been submitted for FCC approval.