I got stuck at Huawei Logo and it won't start, then I followed this instruction
Download the same build you had before getting stucked or newer one, Extract it and transfer "dload" folder to the root of FAT32 MicroSD, Put the SD in the phone, Hold Vol+ and Vol- with Power button to boot into Upgrading mode
Then when the installation shows up it automatically says "Software Installation Failed". How to fix this problem? I found that some say that it must upgrade a transfer package provided by R&D, and I don't know how to update it. I'm stuck in Huawei logo.