Hello, Sorry for writing in english but I don't speak spanish.
First of all, I want to say: Thanks Arthur!
I was going to sell my Mi4 because it became so laggy and warm, but you made it alive again!
Then I would have a question: v9.1 is supposed to always use all the 4 cores at 300Mhz when the phone is "idle"? (With "idle" I mean for example: display on, while doing nothing)