Huawei mobiel phone reset problem

My friend got mobile phone from his friend in France. Model number is Huawei CUN-L21 (android 5.1). When I turn on the phone, phone gives me a message that device was reset and that I enter email but he doesn t know any email. I followed this instructions:

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through talckback -> Chrome I downloaded Go launcher version Z, it enters android but when I want to go to developer options (tap 7 times build number) nothing happens. Any solution to this?

We don’t discuss bypassing of security.