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I bought a Raspberry Pi 4 4GB - 2019 model from amazon The seller says the model is 2019
But in the Pi circuit board its mentioned 2018.
So did I receive an old model or does the circuit board always say the year as 2018 ?
cat /proc/device-tree/model will show details.
My original Pi4 shows Raspberry Pi 4 Model B Rev 1.1
I believe later models with USB fix are Rev 1.2.
The Pi4 was announced on 24 Jun 2019 - there never was a 2018 model, although the board design may be 2018.
Raspberry Pi 4 Model B Rev 1.2
Required, but never shown