I used this method on a old vodafone device i had a long time ago, almost certain its was a Zte.
Ok when promted to connect with wi fi, you first connect to your network, then type any name in ad alternative network connection, tap and hold the name u just typed.
You wil get a option to share, on the share screen tap and hold gmail, the "app info" screen will pop up, here you select notifications, go to the last option witch is "more settings", on that screen select the sub menu and go to "manage accounts"
Ok now you should be in your normal settings menu, here you need to open chrome to download files to help you finnish the process, depending the version of Android you have, there are various ways to do this, Mine was a kitkat simply go to applications and launch chrome.
There is a way with the google app to launch chrome too, tap and hold the google app in the device manager the "app info" screen will appear again go to "notifications" and select "more settings" open the "manage card history" and select chrome.
There are many sites and apps with will assist you from here,