how to recover the back-up data from google account?
As soon as you log back in to your Google account, your old apps should start reloading and their data restored. Of course, if you don't have your WiFi password, this is all happening over your cell data link, which could take a while. You might want to enter the password manually to make the process go more quickly &amp; not consume your data usage.

You should probably note that not all apps, including built-in apps, save all data.