The Lenovo A3900, which was spotted at TENNA (China's FCC) back in February this year, has been announced. Priced at $80, the smartphone is now listed on its manufacturer's website.

Specs-wise, the handset is powered by a MediaTek MT6752 chipset with 1.2GHz octa-core processor, and sports a 5-inch (480 x 854) display. It comes with 512MB of RAM and 4GB of expandable memory, and packs in a 2300mAh battery.
In terms of camera, the budget device features a 5MP rear unit and a 2MP front shooter. It runs Android 4.4 with the Chinese company's own Vibe UI on top, and supports 3G, 4G, Wi-Fi, Bluetooth and OTG connectivity.