hi my husband just gave our son his iphone 5s,so i bought him a $2 optus sim and recharge for $30. i activated sim online. when i put the sim into the iphone it says the sim is invalid. i looked in the settings about the phone and it says the service provider is optus 28.4. does this mean anything. or any ideas how to get the phone to ccept and recognise the sim.
cheers all , any help appreciated.