I lost my phone while overseas. I just bought a new sim card and want to use my old phone number on it. I never registered to have an online my optus account thing, but it seems you need an existing one in order to reclaim your old phone number?! This is driving me nuts. I can't find a phone number to connect me to an actual person to help me on this either. HELP!
My advice would be to get a replacement SIM from a store. They will activate it with your number all ready to go before you leave.