Android 12 upgrade seems to have started for the Nokia 3.4. Multiple users at Nokia Community reported a 1.72 GB update that brings the awesomeness of Android 12. Android security patch for June 2022 comes bundled with the Android 12 upgrade, which keeps the device a little out-of-date. The final build version post upgrade is v3.280.
Nokia 3.4 was launched in 2020 with Android 10 on board. Thereafter it received the upgrade to Android 11, and now finally to Android 12. The rollout fulfills the promised software support for 2 major versions of Android. The Nokia 3.4 is still within the software support time frame which will last until November 2023. However, the smartphone will only receive security updates and maintenance releases to fix existing bugs.
If you own a Nokia 3.4, then you can check for updates from the settings app. Otherwise, the phone will automatically check for updates at routine intervals and it will inform you about the availability when the update hits the device. Not all regions will receive the update at the same time.