Before the HTC One Max was officially unveiled, there were a few leaks showing a dual-SIM version. It showed up in Vietnam, although it was supposedly a unit headed for the Chinese market. It cost 21.6 million dong ($1,015), up from 17.9 million dong ($840) for the single-SIM version. The specifications look exactly the same - 5.9" 1080p screen, Snapdragon 600 chipset, 4MP UltraPixel camera...
Source: http://www.gsmarena.com/dualsim_htc_one_max_crops_up_in_vietnam-news-7091.php
