You can buy a Data Add-on through My Account. Any Data Add-on you buy is only valid for 30 days from the date of purchase.
HMD Global Oy UK Branch, of 2 Kingdom Street, Level 2, London, Paddington Central, W2 6BD, registered in England and Wales under Company No FC033770, UK Establishment No BR018857, is authorised and regulated by the Financial Conduct Authority under firm reference No 949221.