This is the default factory code . Try 1122 first. If that fails, try 1234 , 0000 , or 1111 . If none work, repeat Method 2 (Hardware Keys) to wipe the data again, as the first wipe might not have completed.
To hard reset your feature phone, you can use the built-in settings menu or a secret dialer code if the phone is locked. Method 1: Via Settings (Standard Reset) How To Hard Reset TECNO T528