What does 'no carrier' mean when I try to load an android app?

Trying to load messaging app to my samsung pad but android app site wont let me. or:Trying to load messaging app to my samsung pad but android app sit

Trying to load messaging app to my samsung pad but android app site won't let me.

or:Trying to load messaging app to my samsung pad but android app site won't let me.

or:Do you have service on your phone?

Tags:apps,