Nearly a couple of weeks after it was spotted in the database of the Federal Communications Commission in the US, the Samsung Z4 has been certified by the Wi-Fi Alliance (WFA). Nothing much is currently known about the device, except that it carries a model number of SM-Z400, offers dual SIM support, and packs in a 2,050mAh battery. Also, the device is said to be powered by Tizen OS 3.0, making it the first phone of its kind. Via
Source: http://www.gsmarena.com/samsung_z4_gets_wifi_certified_as_well-news-24232.php