Linda Wertheimer talks to Patrick Tucker, the technology editor for Defense One, about Zello — a walkie-talkie app. That app is becoming a key tool for protesters in Ukraine and Venezuela. From ...
Austin, TX/Brea, CA – February 2016 - Just over three years ago, a young technology company launched a new push-to-talk (PTT) application in the U.S that essentially turned smart devices into ...
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