I want to use a new phone on my current plan - note: plan is past its end date so no longer in contract. It's hard to find info on how to do this. Any suggestions? Thanks.
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Take the SIM card out of your current card and put it in the new phone.
If the new phone has a diffent SIM card size drop into a Optus shop and they'll give you a SIM card the correct size for free on the spot.