I was stuck at step 2. I could not pry open the case, not even a tiny gap, and the plastic opening tool broke. The assembly and case were attached so tight. I even tried to use a flat metal screw driver to try to get an “entering point”. But the case was so well snugged onto the assembly. Maybe Huawei put some glue during assembling process. I halted the repairing. At least the phone is now still functioning with a broken screen.