I wonder how hackable this Nokia device is. I have an old Nokia smartphone. I barely use it as a phone; really it's just for 2FA, when the provider insists on

I wonder how hackable this Nokia device is. I have an old Nokia smartphone. I barely use it as a phone; really it's just for 2FA, when the provider insists on SMS for 2FA. An inexpensive Android device which is hackable and exposes GPIO pins would make an interesting robotics platform. If this device supports replaceable CPU, then perhaps it also exposes GPIO.