I've had an O2 PAYG Sim in my phone for a few years but as I've not used it for some time it's been deactivated and the number no longer exists.The SIM is showing emergency calls only at the moment and ringing it gives a message that the number doesn't exist.
The O2 website says I can get it re-enabled although with a new number but it doesn't actually say how I go about this. Is it possible to do this online or do I need to call someone?
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