What to do with old smartphone.

1. Surveillance:
Salient Eye (will work with old Androids, good job Israel!)
http://www.salient-eye.com/yey-we-got-some-new-old-smartphones/
http://www.makeuseof.com/tag/use-old-smartphone-tablet-security-camera/
http://www.usatoday.com/story/tech/columnist/komando/2015/01/30/old-phone-camera/22532911/
http://www.haaretz.com/israel-news/business/.premium-1.577834
2. Road cam
http://www.benchmark.pl/testy_i_recenzje/polecane-rejestratory-jazdy-na-androida.html/
3. Internet radio
(can also be done with old Nokias with Symbian and WiFi)