I have prepaid SIM *hidden*. I tried to recharge it but it was not done. I suppose it took more one year after last recharge. Please let me know how to recharge this mobile number. Thank you in advance for your advice. regards,
If it is over 6 months since the Sim was out of service the number would have been deactivated. If you want to keep the same phone number you may have some difficulty so you will need to contact Optus.
If you are not worried about the number just order a new Sim card.