Can I roll over data to a new SIM and use in another SIM on a mobile device?

[ELDee]

I've got a 30GB Sky mobile plan paid for by my work. Ive already piggy banked 80GB of data over my first three months. I'm contemplating buying a standalone Microsoft Surface Pro 9 5G and was wondering whether it's possible that if I bought another SIM whether I could put this in the Surface device and then add my filled over piggy bank data to the SIM and use it for data? I think I would have to buy a 100MB SIM (£5) as it's the cheapest option unless anyone knows how to get a free Sky SIM added to my account. Also would I be able to access this piggy banked data whilst roaming? I have EU and US roaming already as part of my original 30GB SIM plan.

[PandJ2020 · Accepted solution]

Any additional SIM added to your account can use the piggybank,

There's no such thing as 'inclusive' of roaming - whilst you can use your data allowance there's a charge of £2 for each 24 hours.