I'm curious why are you going for the umi super? I'm intrigued by it because it has 800mhz 4G band, stock android 6.0 amd 4gb of ram. Just wish it had a Snapdragon CPU instead of Mediatek, looking at benchmarks the 615 is faster and has more feature than the Helio P10
Well, obviously price is an important consideration, and I also have my own personal preferences on style and design, both of which first attracted me to the UMi Super.
I have not finally decided which phone to go for yet, but again the clean, vanilla 'Marshmallow' Android UI is an attraction, as are the 4GB RAM and good sized battery.
I am not necessarily looking for the 'best' camera, or fastest phone around, but, like most users, a 'flagship' model is always desirable, but this one looked like a pretty good offering for the price... especially if I can make use of that $70 discount voucher!

My current 'best buy' choice for a supplier of these is looking like 'Gearbest' at the moment, but I don't want to be hit by excessive customs or import duty charges.