Official invite shows a previously unseen Asus ZenFone 4 device, launch set for August 17

An invitation popped up earlier for the launch of Asus' long-awaited ZenFone 4 line, and according to it the unveiling date was scheduled for August 19. However, the original source has since been taken down and replaced by a second, different invitation (shown above), whose supporting text suggests an August 17 date for the launch event instead.

Front and center here is the company's new Asia Pacific brand ambassador, actor Gong Yoo, who has previously been teased in a contest on Asus Taiwan's Facebook page. So seeing as the company has gone to such ...