I ordered and received an O2 PAYG SIM card.
I was under the impression that once I inserted it into a mobile, the number would be 'live' but when I call it, I get a message advising me that my call cannot be connected at present.
The leaflet that came with the SIM makes no mention of needing to activate the SIM but does mention topping it up.
Does the first top up also activate the SIM?
I wasn't planning on topping up the SIM as I only need it to receive calls.
I was under the impression that once I inserted it into a mobile, the number would be 'live' but when I call it, I get a message advising me that my call cannot be connected at present.
The leaflet that came with the SIM makes no mention of needing to activate the SIM but does mention topping it up.
Does the first top up also activate the SIM?
I wasn't planning on topping up the SIM as I only need it to receive calls.

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