We aim to be completely transparent when it comes to updates and software.
That’s why we want to ensure that Nokia smartphone fans know when their model
will no longer receive the security updates they’ve been used to. This will
apply to the full Nokia smartphone family – so everyone can benefit from a
smartphone that stays secure for longer. After two years of monthly
updates, the Nokia 3 will be the first model to start receiving updates
quarterly updates from September 2019 until September 2020. Source: https://community.phones.nokia.com/discussion/50979/two-years-of-delivering-on-our-pure-secure-and-up-to-date-android-promise