Check How Many SIM Registered Under Any National ID

Check How Many SIM Registered with NID

Go to customer care and disable extra sim
or Transfer the ownership to other family members if needed.

Check Total SIM(s) with all numbers

Dial *16001# then reply with Last 4 Digit of ID (NID/Passport/Dribing License etc)

or Type Last 4 Digit of ID (NID/Passport/Dribing License etc) and send to 16001