Android Guide says
As the components of the phone, such as the processor and radio technologies rely on closed-source components, the updates must be provided by the respective manufacturers.
Therefore, it is important that you purchase a device within an active support cycle. Qualcomm and Samsung support their devices for 4 years, while cheaper products often have shorter support cycles.
First, Qualcom doesn’t provide 4 years of security updates for all their chips, only spme of them (As part of this collaboration with Google, Qualcomm Technologies will now support four Android OS versions and four years of security updates for all Snapdragon platforms utilizing the Project Treble enhancements, starting with the new Snapdragon 888 Mobile Platform)
Second Samsung said they supported their devices with 4 years of security patches, not that all components will still receive security updates.I highly doubt low-ends Galaxy devices Mediatek’s chip get 4y of firmware update.
Generally, messing up OEM and Chipmaker give a wrong impression.
With the introduction of the Pixel 6, Google now makes their own SoC, and they will provide a minimum of 5 years of support. With the introduction of the Pixel 8 series, Google increased that support window to 7 years.
EOL devices which are no longer supported by the SoC manufacturer cannot receive firmware updates from OEM vendors or after market Android distributors. This means that security issues with those devices will remain unfixed.
Highly misleading IMO.Fairphone still supports the Fairphone 3 with MSR, even though it’s Qualcomm chip is EOL.
Of course, it can‘t receive updates to the chip, but as it currently reads it is like it can‘t receive any update at all.
Fairphone, for example, markets their Fairphone 4 device as receiving 6 years of support. However, the SoC (Qualcomm Snapdragon 750G on the Fairphone 4) has a considerably shorter EOL date. This means that firmware security updates from Qualcomm for the Fairphone 4 will end in September 2023, regardless of whether Fairphone continues to release software security updates.
First, we should add Fairphone 5’s 8 years suport promise (they aim for 10). Secondly, we should also mention that FP5‘s chip is supported for 5 years (Fairphone 5 sets a new standard with 8-10 years of Android support | Ars Technica)
The rest is fair,