The official (although never released) SMS Time Stamp Fix for the Sprint HTC Snap. This cab is from HTC.
http://rapidshare.com/files/36210432...Patch.cab.html
I was told to rename it to Snap 2016 Patch.cab (No underscores)
Instructions, first put your phone on airplane mode and install! It fixes old messages that are dated 2016 as well!