The link for the firmware in Buddhika Mahesh post appears to be working now. If you still can't get it to download try the link below, it is a direct link to the zip file from Huawei.
[http://download-c.huawei.com/download/downloadCenter?downloadId=17022&siteCode=worldwide|Android 4.2,Emtion UI,V100R001C00B111,General Version (Newest Version)]
This is the previous release if you would rather try it instead.
[http://download-c.huawei.com/download/downloadCenter?downloadId=16202&siteCode=worldwide|Android 4.2,Emtion UI,V100R001C00B107,General Version (Previous Release)]
Download one of these and then complete steps 2-4 from Buddika's post.