after looking into all the rebranding of the Umidi

after looking into all the rebranding of the Umidigi. I found 5 companies that share this same shell. UMIDIGI, Yekani, Zopo P5000(only difference is a single dual lens camera setup, go to link http://www.zopomobile.com/p5000/), NOA n8 and Infoilio(http://community.umidigi.com/thread-16660-1-1.html or the main site, but not sure how to approach this company https://website.worldgn.com)! The most interesting read of these was the zopo because it was rather descriptive of the physical body. Talks about the Ubands at the top and bottom as being integrated antennas..