Same server as your friends

[Paddo]

A couple of weeks ago I invited a friend of mine but he's as only one on another server. So

All you can do is create a new facebook account and link them upto your friends accounts and then enter T11 to get on their server, unfortunately it would mean starting from Level 1 again.

doesn't mean for 100% sure that you're on the same server

[Panos Bovos]

please if possible to change my server to be with my friends

[Celtic]

I doubt they'll ever interconnect servers. They had to build new servers with new databases and it's simply too demanding for them to get around the problem, they can't be bothered with the fact that you can't see the games of your friends in other servers.

They won't even let you make direct transfers through mobile apps.