You go to the game
- right screen
- send invites
- click that button via facebook
send

Your friend finds in his fb account your invitation for playing TE.
He starts a new team with fb apps.
He dowload from google store in his android the app Netstat and run it.
Must find the line ...217 xxx 1935.
The xxx is the number of the server.
If you have the same number, you are in the same server.
If not, he starts another fb account and try again.

This is only for android not iOS .