"Download these files
Firmware Here --> Huawei Y600-U20
Alternative Driver --> AutoInstaller
SPFlashTool --> LatestVersion
HUAWEI ASCEND Y600-U20 Firmware, this firmware is already tested. You can check out the comment box for confirmation. - See more at: http://firmwares2you.blogspot.com/2014/09/huawei-ascend-y600-20-stock-rom.html#sthash.TqgvZiGD.dpuf