i can only hear my friends talking, and not anyone else. how can i fix it?

i have been thinking of maybe getting a new gamertag. any suggestions?

where do i find privacy settings on xbox 360? :P

i can send messages to my friends, but not to other people that is not my friend. Have someone had the same problem? and can someone please help me?

i can't send messages to other people than my friends. have someone had the same problem? and can someone please help me?