Look this post of facebook user to huawei uk:
"Vodafone have approved another ics update. Have all issues been fixed including lower ringtone on ics, ascending ringtone issue, no memory management whatsover, no 2D hardware accelerated user interface as promised by Huawei and missing English dictionary.
For clarification, some report having ascending ringtone set on gingerbread and as ics doesn't have it, the sound is stuck low on updating to ics with no way to change it.
So much for the updates on what was happening. Its not keeping us updated if you say here is the rom for download. Vodafone have stated publicly they have approved a rom and passed it back to Huawei. Is everything stated above fixed and working 100% and how long will it take Huawei to release it? Will B936, the rom you released to Uk users in 'error' be upgradeable? Is it ota update or download from Huawei website?"
Who know something?