Hi,
I'm sorry you are facing this issue but Huawei B900 belongs to consumer product. For queries and issues regarding any Huawei consumer products (i.e. mobile phones and tablets), please visit the Huawei consumer Website or Hotline Service.
Support:
http://consumer.huawei.com/en/.You are also welcome to send an email to mobile@mail01.huawei.com if you have any questions about Huawei Consumer products.
I hope it helps.