A:Answer Hey Andredantas,
Yes, there may be a cancellation fee for cancelling a Verizon unlimited plan after 1 month, even if your phone is paid in full. Verizon's cancellation fee for postpaid plans is $350, but it is prorated, so you will pay less the longer you have had the plan.
However, there is a way to avoid paying the cancellation fee: if you cancel your plan within 30 days of activation, you will not be charged a cancellation fee.
Hope this helps you make the right decision for your needs!