When does PAC code take effect?

[eaglevelo]

I am leaving my current supplier (Sky) to join O2. My SIM-only is due to arrive this week but Sky says they will switch off my service within one working day of giving O2 the PAC Code. Does that mean I will have no service for a few days or does the PAC code not take effect properly until the new SIM is in the post?

Apologies if this is a simple question but I cannot find a simple answer. Thanks in advance for any help.

[MI5]

@eaglevelo 

It will switch on whatever date O2 has given you for the port.

Guide: Migration & porting into O2 

Guide: How to find help & contact O2 

[Enlli]

Well, the good news is it is the Weekend so no codes will be activated Saturday or Sunday 

If you have given the code to O2 before around 5 today then you are looking at Monday or Tuesday.

Sky should text you the transfer date.

It matters not if you have the O2 SIM

[eaglevelo]

Thank you but I am still not sure if I will have any service if the new SIM does not arrive until Friday (as advised by O2).

[MI5]

What date have you been given for the port @eaglevelo ?

[eaglevelo]

I only have "Your order will be delivered on 23/05/2025" - SIM-only order. Thet gave me a temporary number until my number is ported across. Is that when the PAC code comes into effect? Apologies for the questions - not ported for many years. Thansk for your patience.

[MI5 · Accepted solution]

@eaglevelo 

Knowing O2 as we do, nothing will happen until you chase them up.

I'd wait until your sim arrives then give them a call to start the process.

[eaglevelo]

Thank you once again. My wife has been with O2 for a few years without issues, so fingers crossed🤞