When I buy a new phone, I keep the old one as a backup, in case I need to send the new one for repairs. This means, by the time I've got a phone that I am "not using," it's too old to sell. So I've got a handful of old devices kicking around. A few are too old to do anything with, but my Nexus 5 and Nextbit Robin are still usable, if I installed ROMs on them.
I may use one as a glorified remote control for my Chromecasts. What to do w/ the other?