Me han contestado lo siguiente:
Dear User:
Huawei Customer Service is pleasure to be at your service,sorry to bring you the troubles,if you want to unlock your phone, you should meet these conditions as follow:
1、Please register your Huawei ID in our official website
http://huawei.com/en on your phone.
2、Log in your Huawei ID for continuously 14 days.
3、Each Huawei ID should not apply for the unlock code more than twice within half a year.If you meet all the informations,please go to
http://emui.huawei.com/en and click the 'Download'button to login your Huawei ID other than any other third party ID to apply for the unlock code.please contact us by email or local service hotline as following if error message appears.
TEL：
http://consumer.huawei.com/en/contac...tm?tag=hotline
Mail：
http://consumer.huawei.com/en/contac....htm?tag=email
Please submit your mobile model, SN, IMEI/MEID and erro message in your email.
Thank you for your supporting to Huawei and you can add Huawei official Wechat ID :Huawei 400 to learn more.Hard service 100+, out of service is just the basis,the excess satisfaction is our eternal pursuit!