You don't say which model of Hauwei phone you have, but maybe the links below will help?
http://apn-settings.com/huawei-p9-apn-settings-guide-for-dummies/
http://apn-settings.com/apn/huawei-p10-apn-settings/
https://www.androidcentral.com/what-apn-and-how-do-i-change-it