China-Handy, Advise needed!

I will buy me a new smartphone.

I prefer one with a 6 or 6,5 inch display; i use the phone for internet.
Cubot, Doogee or Xiaomi?

Apple and Samsung are out of this, why should i pay tripple for spyware?
LTE-ready, Android 6.0 or newer, at least 16 gb internal memory and a nice display would be cool.

My fellow Glpers, do you have any suggestions?