Question about multiplayer and server

Dear Unity users,

I am developing my first game, I have chosen to make a simple card game. When I am finished with the game I want to place it in the android store. The development is going really nice, I have programmed the game all alone and solved all the error's.

Know what I want to know is: How can I make the game multiplayer? I did some research and I have found Photon, unity networking and uLink. At this point I know that these are mulitplayer engines but my question is: Which one do I...

Question about multiplayer and server