You cannot currently manage your account using existing HMD Mobile apps for Android or iOS. You can manage your HMD Mobile plan by logging in to My Account.
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.