Kind of phone signal that's nearly obsolete (4)
I believe the answer is:
busy
(Other definitions for busy that I've seen before include "crowded" , "Fully employed" , "Full of activity" , "With lots to do" , "Like a bee?" .)
I believe the answer is:
busy
(Other definitions for busy that I've seen before include "crowded" , "Fully employed" , "Full of activity" , "With lots to do" , "Like a bee?" .)