Business Insider: Here’s how to use Zello, the walkie-talkie app people are downloading ahead of Hurricane Irma

Business Insider: Here’s how to use Zello, the walkie-talkie app people are downloading ahead of Hurricane Irma. “As Hurricane Irma rips through the Caribbean and heads toward Florida, a free smartphone app is emerging as an important tool for search and rescue. Called Zello, the app lets you use your phone as a walkie-talkie or two-way radio as long as you have a network or Wi-Fi connection.”