Is the Unlimited Messaging plan for ATT $30 per person or one flat rate per month?

beachcutie

New member
I currently pay 20 dollars for unlimited messaging on one of the lines my family has but I was wondering if the 30 dollars is one flat monthly fee covering everyone. I have 5 lines and 30 dollars sounds very reasonable. Is there a start up fee for this? Anyone have the unlimited messaging plan?
 
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