4.4 miui 7 to 5.1 miui 7 ... bad results ... boot loop
5.1 miui 7 to 5.1 miui 8 ... I can't try if the previous test fail..
4.4. miui 7 to 4.4 miui 8 works...
I think that the PROBLEM is the TWRP version...embedded TWRP and xiaomi.eu TWRP are 3.0.0...
For me remain to 4.4 is not a...