Moving PAYG balance to new contract

[p196]

I recently signed up a new O2 contract. I also have a PAYG number which I no longer use.  Is it possible to bring the balance over to the new contract (and cancel the PAYG number)? 

I searched previous threads on this and it was suggested to use "Keep your number" option to move PAYG number to contract (and keep the balance the same time). My problem is that I am going to port my main number over from another network.  Will this "Keep your number" option jeopardize my upcoming port?

I phoned O2 Customer Service (contract section) and they said they could not do anything as they had no access to my PAYG account. I guess PAYG CS does not have access to my new contract either? It feels like a "left hand does not talk to right hand" moment and really does not give any confidence as, if something goes wrong, there is nobody to contact for a resolution.

[MI5 · Accepted solution]

@p196 

You can only transfer your balance if you migrate your PAYG number to your contract so I'd do that first, get your credit added, then port in your number.

[p196]

@MI5 Thanks a lot. So there is definitely no problem to port my main number over afterwards? I am worried that you are allowed to port/transfer in number once only. There is no rule like this, is there?

[MI5]

@p196 

No rule like that. You can do it as many times as you wish.