Upgrading my O2 account with a new O2 contract

[JennyL2024]

I'm trying to upgrade my pay monthly but its cheaper to buy a new contract.  I'm in the process of trying to fill out the form to buy new contract.  I want to keep my existing number do I put Yes or No to "would you like us to cancel your old contract for you?" (if I say no it asks for a STAC code). 

Will my current bolt on with VM be affected if I have a new contract?

thanks

[MI5]

@JennyL2024 

There's no need for a STAC or PAC at this stage, so leave blank.

You can migrate your number later Guide: Migration & porting into O2 

As long as you have both VM and O2 you will still get Volt benefits Volt Megaguide