Hi @TG16 If the guarantee is not mentioned on the Samsung website it would only be one year. They do have 5 years from time to time but for instance do not believe an offer such as this is currently applicable.https://account.samsung.com/accounts/v1/Samsung_com_UK/signInGate?response_type=code&client_id=84hg4... offers listed at moment include Trade in and cashback. standard warranty is 1 year https://www.samsung.com/uk/support/warranty/
obviously some stores do offer extended warranties.
I do not work for Samsung or make Samsung Products but provide independent advice and valuable contributions.
My Device- S21 Ultra 5G ( SM-998B/DS ) CSC= BTU , 12GB/256GB
One Ui 4.0,Android 12 Official Version.