NICTA CEO, Charles Punaha, explained that sim users need to take into consideration the 30 day in-active period, when a card can be made in-active if there is no usage by the user.
He also warned that after 90 days the operators can recycle the number back into the system to be reissued to new sim cards.
Meantime, Communications Minister, Sam Basil has warned all operators to not charge users for registration of sim cards.
The Minister says that any operator found to be charging users will be dealt with by NICTA and the ICCC.