UMi is a little-known company, which probably shined brightest last year, when it announced its $299 top-tier phone – the Zero. It had a MediaTek 6592 SoC, 2 GB of RAM, a 5”, 1080p Super AMOLED display, a 2,400 mAh battery, and a super-thin 6.4 mm body. Naturally, as with…