Privacy Blog

"Friends don’t let friends get spied on.' – Richard Stallman, President of the Free Software Foundation and longtime advocate of privacy in technology.

Atom, World`s Smallest 4G Rugged Smartphone

NOTE: This article isn’t strictly about privacy. However, it is about a very small cell phone that should become popular and also works well with Zello, the privacy-oriented walkie-talkie app. Go to to see my previous articles about Zello.

A review in the Digital Trends web site says, “The Unihertz Atom won’t replace your smartphone, but it’s perfect for outdoors.”

While I haven’t yet had my hands on a Unihertz Atom cell phone, I suspect that description is accurate. It appears to be tiny, rugged, and resistant to water, mud, and all the other nasty stuff one finds in the great outdoors. I don’t think the Unihertz Atom is a good phone for everyone but it certainly will appeal to those who spend a lot of time outdoors, either for work or for pleasure or both.

One thing that appeals to me is the red push-to-talk button on the side of the Unihertz Atom phone. It works with the Zello push-to-talk walkie-talkie application, which is also pre-installed on the phone.

Red Push-To_Talk Button

Of course, anyone can add Zello to almost any smartphone within a few seconds. The fact that Zello is pre-installed isn’t terribly exciting. However, the addition of the red push-to-talk button on the side of the Unihertz Atom phone is a great idea. Instead of having to push a big red circle on the face of the cell phone as you do with most other cell phones running Zello, the red button on the side functions more like a walkie-talkie carried by law enforcement personnel, first responders, plumbers, construction workers, and field service personnel everywhere. Zello converts most any smartphone into a walkie-talkie with high-quality worldwide coverage, as long as both parties are within range of an Internet connection. It works equally well on a cellular network, a wi-fi connection, or even on a wired Internet connection (on some devices, such as a Windows PC).

In addition, Zello provides very private conversations that are difficult, perhaps impossible, for spies, hackers, or government agencies to monitor. See for my earlier article about Zello’s privacy.

I like Zello’s walkie-talkie app so much that I purchased a walkie-talkie made for use with Zello: The Radio-Tone RT4.

Radio-Tone RT4

I am pleased with the Radio-Tone RT4 and I use it daily. However, if the Unihertz Atom had been available at the time, I think I would have purchased that instead. The Unihertz Atom is smaller, lighter, and probably works better as a cell phone as well as a Zello walkie-talkie.

You can read a review of the Unihertz Atom by Mark Jansen in the Digital Trends web site at TheUnihertz Atom is not yet available but is expected to ship in October, 2018. The Unihertz Atom Kickstarter page may be found at while the Unihertz Atom web site is available at

Categories: Cell Phones, Hardware

6 replies

  1. Can this devise The Unihertz Atom use any PTT App i.e. Eschat, Trackforce etc. FYI: these Apps can be obtained on the Google play store


    • I haven’t used the UniHertz cell phone with any of the applications you mentioned. However, I use it most everyday with Zello, a very popular PTT walkie-talkie app and it works well with Zello. In fact, that’s the primary reason I bought the tiny cell phone: to work with Zello.

      When the phone was brand new, one of the first things I did was to download and install Zello. I then opened the app, entered my Zello user name and password, and everything worked immediately. The push-to-talk button works perfectly with Zello. I didn’t have to make any changes or install any software drivers. The push-to-talk button and everything else worked perfectly on the first attempt.

      The only significant drawback to this phone is that the display screen is so tiny that it is often difficult to read. Nobody will be using this phone for text messaging while driving down the highway! I guess that’s a good thing, not a drawback!


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