Hi, why not try a "Forced Upgrade" from instructions in the User Manual?
2.1 Forced Upgrade
The forced upgrade method is as follows:
Note: After the forced upgrade, all user data (contacts, text messages, and multimedia messages) will be lost.
1. Go to Support - Huawei Device Co., Ltd..
and search for the latest U8150 version, download it to the local drive, and uncompress it to extract the upgrade file.
2. In the SD card root directory, create a new folder named dload. Take the extracted upgrade file, UPDATE.APP, and copy it to the dload folder.
3. Insert the SD card into the mobile phone.
4. When the mobile phone is powered off, press the Volume +, Volume -, and Power keys at the same time to initiate the forced upgrade.
5. After the upgrade is complete, restart the phone, and continue to use as before.