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There are so many things people can do with their old phones other than throwing it as e-waste.
This is what I did; to my 3 years old phone; cheapest smart phone from Motorola. Moto-E (Condor) was the perfect value for money then.
Once it boots up you will see your old device in reincarnated avatar.
You can begin customizing with installing FDroid. Eg., AndStatus or WaveUp.
This would help you run away from Surveillance Capitalism.