Nokia 5 2017 and Nokia 3.1 Plus : In next few days. (possibly this week)
Nokia 6 2017: In a week or two.
Nokia 3 and Nokia 1: Last to receive Pie somewhere in Q2 of 2019.
All the remaining smartphones Nokia 5.1, Nokia 3.1, Nokia 2 and Nokia 2.1 is scheduled to receive the Pie update in between i.e before Nokia 3 and Nokia 1.
Source:
https://www.androidauthority.com/nokia-phones-android-pie-update-roadmap-945377/amp/
Comments
https://nokiamob.net/2019/01/22/android-9-pie-reportedly-coming-to-nokia-3-1-plus-and-5-this-week-schedule-known-for-nokia-6-3-1-and-others/
Tweet from Mr. Juho Sarvikas about the Pie Update for every remaining phone with dates. Great Job by Nokia sharing this detail and not keeping customers in dark. This certainly provides hope for all the users that indeed HMD care about them.