If you have already paid the smart family package fee of 1599 yuan, and included the minimum monthly consumption of 129 yuan, there is no need to pay extra fees in general. However, if your usage exceeds the minimum monthly consumption, such as the call duration and traffic included in the package, you may have to pay extra for the excess.
I suggest you check your phone bill, understand the monthly consumption, ensure that your account balance is sufficient, and avoid arrears.