Had the same problem with MIUI installing to a slot in Boot Manager. I was able to get past the android man at setup by hitting all four corners on the screen in a certain order. I couldn't tell you what order though...LOL. I just kept trying different orders and finally it worked. Remembered that trick from a ROM I install on my Nook Color. However, once I got past that I no cell service. Tried reflashing the zip but that did not help either. I am going to try another 1.10.21 download I found and see if that one works.