User blog:Commandah/Guest name

I have this problem on my tablet though.I recently downloaded the SAS 4:Zombie Assault.after some several single-player games I tried the multiplayer one.While waiting in the lobby I saw that my name was different it wasn't the name I took,The name on the lobby was "Guest0982".I mean......That sounds weird because other players has their unique names and I have a crappy multiplayer name.How can I fix this problem?