Complex sentence: The Priv is the first BlackBerry-branded smartphone not to run the company's proprietary BlackBerry OS or BlackBerry 10 platforms, instead running a version of Android customized with features inspired by those on BlackBerry phones and security enhancements.
Split into simpler sentences: The Priv is the first BlackBerry-branded smartphone that does not run the company's proprietary BlackBerry OS or BlackBerry 10 (BB10) platforms. Instead it runs a version of Android customized with features inspired by those on BlackBerry phones and with security enhancements.