You can play multiplayer games with your N-Gage friends.

First add players to your friends list. Select Menu > Applications > Games, and MyFriends. Enter their Player Name to the Add a Friend field. To send the invitation, select Send. When the recipient accepts your invitation, the player appears on your Friends list.

You’ll find your Friends list in the My Friends tab. Any friend who is available for a multiplayer game has a green indicator.