So, if you are on Yoigo or Australian one and you want to de-brand+possibility of rooting with the given file, just put THIS original NO BRAND Huawei U8650 firmware
on your SD in /dload/ folder (you'll see easily: the path is alresdy in the compressed file), turn off the phone, remove the battery a few seconds, than put SD and battery in the phone end turn it on with "VOL+" + "VOL-" + "ON" at the same time (yes, three buttons, but i'ts easy ;)).
He will automatically upgrade the firmware to the unbranded one (obviously this is a reset too, so you'll lost your settings) in 2-4 minutes.
Than you'll have a cool UNBRANDEND
U8650 phone that you can root with the procedure told in the posts before.