Switching from O2

[Michael47]

I requested a PAC code on Friday but I am still connected to your network, how long does it take before you close this account and I can use my new phone?

[jonsie · Accepted solution]

You will still be an O2 customer until you give the PAC to another network or you call up to cancel your account

Guide: Cancelling Your Contract 

[Enlli]

Nothing happens over the weekend on any of the networks re pac codes

Depends when on Friday it was given and when the new network processes it.

Once you have given the code to your new network everything is in their hands from then on.