Steven Sumpter presented the following explanation :
> On Thu, 29 Jun 2006 18:46:45 +0000, Dr. Compynei wrote:
>
>> I want to upgrade my phone to a K800i on o2. I've been told that itl be
>> £49.99 which is silly considering they are giving them away to new
>> customers.
>>
>> I asked for my PAC in an attempt at being asked to stay but they wouldnt
>> budge and I got my PAC.
>>
>> So, two questions
>>
>> 1) If I cancel can I just sign up again to o2 and give them my existing o2
>> pac code and keep my number?
>
> DON'T CANCEL!
>
> If you cancel your contract, your PAC will be useless and you will lose
> your number. The PAC is used instead of cancelling, and if you don't use
> it then you will stay with your current provider. If you do use your PAC
> then most providers will take the date of issue as the start of your 30
> days notice for billing purposes.
>
> If you really want to sign up to O2 as a new customer but keep your
> existing number then you will have to use your PAC to transfer to a
> different provider, then get another PAC issued by that provider to
> transfer back to O2. You will have to wait for the first PAC to expire
> before you can be issued another one.
>
>>
>> 2) If I don't use the PAC and can get them to come round in the o2 shop
>> will it just expire and my contract remain?
>
> Yes.
I recently had te same problem, have moved the number to Tesco mobile
as they run on the O2 network so I know the reception is the same. In a
week or so I will move the number back to O2.