This was their original announcement article https://news.samsung.com/global/samsung-sets-the-new-standard-with-four-generations-of-os-upgrades-to-ensure-the-mo

This was their original announcement article https://news.samsung.com/global/samsung-sets-the-new-standard-with-four-generations-of-os-upgrades-to-ensure-the-most-up-to-date-and-more-secure-galaxy-experience https://news.samsung.com/global/samsung-sets-the-new-standar... This is their current security update list (not os updates) https://security.samsungmobile.com/workScope.smsb https://security.samsungmobile.com/workScope.smsb "... And select devices launched in 2019 or later will be supported with firmware security updates for a minimum of four (4) years following their global launch, while select newer devices will receive up to five (5) years of security updates." It's a good start I'd say, considering that Samsung is a major player in the android phone space.