Keep mobile number to old payg sim

[jimlad68]

When I have used up my GiffGaff credit I hope to bring my number across to my O2 PAYG SIM. 

I have had this sim for some months, will it still be OK to transfer, or will I need to get a new sim.

[Cleoriff]

Hi @jimlad68

Follow the advice in this link about keeping your number

https://www.o2.co.uk/help/phones-sims-and-devices/how-to-keep-your-mobile-number

Best of luck  and welcome to the forum

[jimlad68]

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@Cleoriff thanks for that. I had checked that out but it implies it is for NEW sims e.g.
"Let us know your PAC when you place your order."

I just wondered if there was a time limit, as I said, I have had mine for a few months. 

[jonsie]

A PAC is only valid for 30 days so you need to request another from giffgaff

[MI5 · Accepted solution]

There is no time limit on porting in your number to O2.
It doesn't matter how long you have had the SIM for it will just change on your current O2 SIM card.