What is the best thing to do with your old cell phone? Donate it? Sell it? Re-use it for parts?

If your phone does not have any resale value, you might enjoy
taking your smartphone apart to see how it all works (in a very crude and functional way...oh! this is the RAM...oh! this is the gyroscope chip...and this is the WiFi receiver).  This is especially fun if you have kids (or are a kid, physically or mentally), and doing it on an old phone will give you the confidence to switch out individual parts on your new phone if they fail.



I recently took apart my old Samsung Captivate (the last phone with a physical retractable keyboard that Samsung made) and now I am obsessed with teardowns.  All acquaintances should hide their old phones.