If I request my PAC code from my mobile company, it doesn't actually cancel the contract until I give it to another company, does it? I mean, if I ask for the PAC and do nothing with it, nothing will happen to my current contract...????
They will not cancel your contract but the code is only valid for a limited period (30 days I think). If you don't use it to change supplier within that period you will have to ask for another one.