Hello, I am French, and I have a xiaomi s1. Yesterday I wanted to update MIUI (upgrade from Version 5 to Version 6) with an official rom (on miui.com). The installation failed. When I wanted to turn on my phone, the phone gets stuck on startup logo (white miui) for hours. I try to empty the cache, reset ... but nothing happens, it will not start on anything except miui logo. I try to install an SD card with a new rom but do not want to find the update file on the external card. I am disgusted. Have you solutions please? Help me.