Crédits photos

  • Samsung_galaxy_s4_smartphone_screenshot.png, by Anuragags (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons
  • By ProtoplasmaKid (Own work) [CC BY-SA 4.0 (http://creativecommons.org/licenses/by-sa/4.0)], via Wikimedia Commons