It's estimated that every square inch of a smartphone harbors roughly 25,000 germs, meaning that anyone who doesn't make a habit of sanitizing their cell phone regularly is holding anything but a clean phone.
Knowing that smartphones are one of the most important devices for travelers today, Japan's Narita international airport in Tokyo is now offering toilet paper for handsets in its restroom facilities. These smaller rolls sit beside full-size toilet paper dispensers and are printed with instructions for cleaning, as well as a welcome message and information on getting connected to Wi-Fi.
With a wipe, the special paper rolls from Japanese mobile giant NTT Docomo are able to remove bacteria from smartphones and effectively reduce the spread of germs throughout the airport and beyond.
Japan's Narita Airport Has Toilet Paper Rolls to Clean Phones
Laura McQuarrie — December 24, 2016 — Tech
References: mainichi.jp & digitaltrends