It's not clear why Sprint would've decided to kill it off, because all that's left is a gimped lock screen (with the option of using Android's regular pattern lock).

ENGADGET: Epic 4G review

Kobo's diamond pattern reappears on the Vox's lock screen, which also contains a rotating selection of quotes from authors -- an immediate reminder that, at its heart, the Vox is a reading device.

ENGADGET: Kobo Vox unboxing and hands-on (video) Hands-on