That mean ca is enabled on your phone but not in use, which band are you on? if you are on b41 that may mean that tower does not have ca yet.
although i have not seen this lately, on the early days of Chicago ca deployment, i have also seen case where the ca line will only show connection info when there is an active download in progress and show not config when the first line says idle, so if you are on unlimited or have lots of data to spare, try having an active download or speedtest in the background while you check *#0011# again.
if you are on b25/b26, b25/b26 ca is not supported by sprint at this point, so try getting on b41 and check again
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