New sim only offer, keep my number and roll over existing data

[SML]

I'm looking to take out a new sim only offer but I'd like to keep my existing number (already with sky) and want to roll over the data in my piggybank. Is this possible, if so how best would I do this? Thanks 

[caesarome]

@SML 

As you can't use a Pac code to move a number from one Sky sim to another Sky sim so you have a few options.

You could call Sky to ask them if they will apply the offer to the sim you already have.

If they will not then you could either use the sim you have or if you want to transfer the number you have to the new sim then you would need to use a Pac code to transfer your current sim number to a PAYG network and then use another pac code you get from them to transfer it back to your new Sky sim.