SIM showing as invalid (stopped working)

[Anonymous]

I have an O2 prepay SIM which has stopped working/will not accept a top up.

It was a replacement for a previous faulty SIM and was sent to me less than 6 months ago.

I can supply the phone number if necessary (but don;t wish to do so on an open forum)

How do I get it working again? (The number is used for authentication purposes for certain online services)

[Anonymous]

@Anonymous It sounds like you need a new SIM card. You can pop into a local o2 shop & get a sim & they will do a sim swap for you or you can order a sim online then do the swap yourself 

https://www.o2.co.uk/shop/sim-cards/pay-as-you-go/

http://swapmysim.o2.co.uk

[MI5]

Not sure how a sim card fails to accept a top up as you top up the account not the card.
What exactly is happening?

[Anonymous]

have you tried cleaning the contacts on the sim card its self?? sounds daft but sometimes a quick wipe of teh simcard... if not looks like you need a new sim as it seems to of failed!! not sure why its not accpeting top ups!! 

[Beenherebefore]

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@Anonymous wrote:

It was a replacement for a previous faulty SIM and was sent to me less than 6 months ago.

How do I get it working again? (The number is used for authentication purposes for certain online services)

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Have you used the SIM to make any calls/SMS in that 6 month period ?