Hello, my Mi4 sometimes goes into bootloop and I have to enter TWRP and shut down manually and then turn it on again, sometimes when turning on it does that loading bar like when updating from older ROM. I am running the latest MIUI 7, and since the MIUI8 is being released tomorrow, I was thinking about making a complete cleaning before installing the MIUI8 to check if it is a file causing the bootlooping. How can I procede to do it? Maybe throw fastboot? If so, the weekly ROM provided to do the update can be used to do the fastboot?