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The Galaxy Z Flip Foldable Phone: 5 Important Facts to Know



When Samsung unveiled its S20 lineup of flagship devices, it also announced its 2020 foldable smartphone: the Galaxy Z Flip.

The device is significantly different from its foldable predecessor, the Galaxy Fold. From the specs to its unique form factor, features, and price, here’s what you should know about Samsung’s Z Flip smartphone.

1. Galaxy Z Flip: How the Fold Works

The Galaxy Z Flip folds like a clamshell or compact mirror, offering a different form factor than the Galaxy Fold (which folded like a book). This design is similar to the 2020 Motorola Razr foldable smartphone, which launched just a few days before Samsung’s announcement.

However, what makes it different from other foldable smartphones is the material used for the display. The Z Flip’s foldable screen is made from glass, not plastic. According to Samsung, the phone’s display includes bendable ultra-thin glass “that has never been seen with a foldable device before.”

The company has also improved its hinge technology to prevent some of the issues seen with the Galaxy Fold. The hinge includes “sweeper technology” that uses nylon fibers to prevent dirt and debris from entering the device via the hinge mechanism.

Rather than unfolding to become a tablet or phablet, the Z Flip has similar dimensions to a regular smartphone. When folded, it measures 2.9 x 3.4 x 0.68 inches.

Fully unfolded, you can still easily use the phone with one hand, as the length of the phone measures 6.59 inches. For context, this is just 0.16 inches longer than the Galaxy S20 Ultra.

2. Galaxy Z Flip Specifications and Features

Besides the unique form factor of the device, what else can you expect from the Galaxy Z Flip? It’s not packed with the same hardware or features of the Galaxy S20 series, despite Samsung announcing the devices at the same event.

While the Z Flip doesn’t have the battery or camera power of the S20 series, the smartphone still has some solid specifications. Below is a summary of the main Galaxy Z Flip specs:

  • Display: 6.7-inch 2636 x 1080 Full HD display with dynamic AMOLED
  • Battery: 3300mAh
  • RAM: 8GB
  • Storage: 256GB
  • Main camera: Dual-lens camera (12MP ultra-wide + 12MP wide-angle lens)
  • Front-facing camera: 10MP selfie camera

The Z Flip also includes some of the general features seen across Samsung’s premium devices. For instance, the device supports the Wireless PowerShare function. This allows you to charge other devices by placing them on your Samsung device, so long as they have wireless Qi charging support.

Other features include 4K video recording and optical image stabilization software, a side fingerprint sensor, and Samsung Pay integration. You can also expect to find Samsung’s AI assistant, Bixby, on the device.

3. Unique Features Enabled by Z Flip’s Design

galaxy z flip smartphone bent and semi folded
Image credit: Megan Ellis

The Galaxy Z Flip’s form factor is not simply a gimmick. Rather, there are specific features and functions of the smartphone that stem directly from its folding capability.

The phone doesn’t need to be fully open or fully closed to use. Much like a laptop, you can use it with the hinge at various angles.

Samsung calls this the phone’s “flex mode.” When the screen is open at an angle (rather than fully open or fully closed), the OS splits the device into two four-inch screens. This allows you to view content on the top screen and use the lower screen for navigation and touch controls. You can also opt for a multi-tasking window that lets you open a different app on each half of the device.

The Z Flip is also able to stand up on its lower half when in flex mode. This has a few uses: you can prop the phone on its lower half when taking photos and videos, or place it on a flat surface while watching videos.

In particular, this will become especially useful for night photography, which requires a stable surface due to long exposure times. Samsung has also enabled gesture triggers for selfies—a wave of the hand will act as a shutter button when the Z Flip is taking a photo in flex mode.

galaxy z flip smartphone folded
Image credit: Megan Ellis

The Galaxy Z Flip also has a small 1.1-inch display on its cover that lets you check notifications and lock screen info—essentially acting as a tiny always-on display. You can use this screen as a viewfinder or preview window when taking selfies.

4. Galaxy Z Flip Does Not Come With 5G Compatibility

Samsung is pushing 5G support in its Galaxy S20 range, with all phones in that series featuring 5G support. But the same is not true for the Galaxy Z Flip. At its launch, the Z Flip is only available in a 4G-compatible option.

It’s possible that a 5G variant will release at a later date. However, this depends on a variety of factors, such as the Z Flip’s overall success and reception.

Samsung has played it safe with the smartphone’s launch, choosing limited markets and variants for the device over a widespread release. If 5G compatibility is essential for you, you’re better off looking at Samsung’s S20 range or other smartphones that support 5G connectivity.

5. Galaxy Z Flip Price and Availability

galaxy z flip foldable phone in purple

The Galaxy Z Flip will see a limited release in the United States and South Korea on February 14, 2020. Other markets, such as South Africa, will also see a small quantity released in February, followed by a larger release in March 2020.

Initially, only the Mirror Black and Mirror Purple options will be available. However, Samsung plans to introduce the Mirror Gold option in select markets at a later date. A Thom Browne limited edition of the smartphone will also be available, alongside Thom Browne editions of other Galaxy accessories.

The launch price for the Galaxy Z Flip is $1,300. Pre-orders for the device opened after the announcement. You can order your device via the Samsung store, as well as selected mobile carriers.

More Foldable Smartphones to Consider

Now you know what to expect with Samsung’s Galaxy Z Flip. We’ll see how this phone performs and if it marks the widespread adoption of foldable phones. As it turns out, since 2019, there’s been a boom in companies attempting their own takes on dual-screen and foldable smartphones.

To find out more about the concepts and devices in this sphere, check out our explainer on foldable smartphones.

Read the full article: The Galaxy Z Flip Foldable Phone: 5 Important Facts to Know

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The Essential Tmux Commands Cheat Sheet



Running commands in the terminal allows you to do many tasks more quickly than you could using a graphical application. But command prompts aren’t all that great for multitasking, at least not without some help. And that’s where tmux comes in.

Tmux or terminal multiplexer is a command line program that enables you to run and view multiple commands in a single terminal window simultaneously. Each command exists in its own window pane as though you were using a full-blown tiling window manager.

To help you get started with tmux, we have compiled key tmux terms and commands in the cheat sheet below.

FREE DOWNLOAD: This cheat sheet is available as a downloadable PDF from our distribution partner, TradePub. You will have to complete a short form to access it for the first time only. Download The Essential Tmux Commands Cheat Sheet.

The Essential Tmux Commands Cheat Sheet

Shortcut Action
¹Ctrl + b Default prefix key
t Show time (ESC returns to the terminal)
: Enter a command (Example: “:new-session”)
list-commands List all commands that tmux supports
Tmux Terms
Pane An open command prompt (or pseudo-terminal). Panes may appear side by side or vertically stacked inside a window.
Window Your view of open panes
Session A set of open windows
Client The background process that displays your session
Server A single server manages all open sessions (Servers and clients are separate processes that each communicate through a socket in /tmp.)
Creating and Managing Panes
% Split screen or pane in half vertically, creating a new pane on the right
Split screen or pane in half horizontally, creating a new pane at the bottom
Switch to the adjacent pane
o Switch to the next pane
q Show pane numbers (when numbers appear, press number to switch to that pane)
{ Move current pane to the left
} Move current pane to the right
x Close the current pane
Ctrl + Resize pane in steps of one cell
Alt + Resize pane in steps of five cells
Alt + 1 Arrange panes in the even-horizontal preset layout
Alt + 2 Arrange panes in the even-vertical preset layout
Alt + 3 Arrange panes in the main-horizontal preset layout
Alt + 4 Arrange panes in the main-vertical preset layout
Alt + 5 Arrange panes in the tiled preset layout
Creating and Managing Windows
c Create a new window
! Detach pane into a new window
n Switch to the previous window (in order of creation)
p Switch to the next window (in order of creation)
l Switch to the window used most recently
w List all windows and their corresponding numbers
Switch to the corresponding window
, Rename current window
i Display info about the current window
f Search for text in open windows (ESC exits the search)
Creating and Managing Sessions
new-session Create a new session
$ Rename current session
list-sessions List open sessions
attach-session Create a new client and attach it to the specified session (-t target-session)
detach-client -s target-session Detach clients attached to the current session
kill-session Destroy the current or specified session
¹To activate a shortcut, you must first press and release the prefix key, then press the shortcut key.

More Help With the Linux Command Line

The commands above help you work in tmux using multiple panes, windows, and sessions. If you really want to make tmux your own, you can go further by editing the configuration file stored at the following location:


You can also try your hand at scripting.

When you’re working exclusively from the terminal, installing tmux is akin to installing a window manager. This gives you more flexibility when working on servers or other devices without an attached screen. Have fun exploring tmux! And if you’re looking for more command line resources, take a look at our Linux commands reference cheat sheet next.

Read the full article: The Essential Tmux Commands Cheat Sheet

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Hackaday Links: April 5, 2020



Git is powerful, but with great power comes the ability to really bork things up. When you find yourself looking at an inscrutable error message after an ill-advised late-night commit, it can be a maximum pucker-factor moment, and keeping a clear enough head to fix the problem can be challenging. A little proactive social engineering may be in order, which is why Jonathan Bisson wrote git-undo, a simple shell script that displays the most common un-borking commands he’s likely to need. There are other ways to prompt yourself through Git emergencies, like Oh Shit, Git (or for the scatologically sensitive, Dangit Git), but git-undo has the advantage of working without an Internet connection.

Suddenly find yourself with a bunch of time on your hands and nothing to challenge your skills? Why not try to write a program in a single Tweet? The brainchild of Dominic Pajak, the BBC Micro Bot Twitter account accepts tweets and attempts to run them as BASIC programs on a BBC Microcomputer emulator, replying with the results of the program. It would seem that 280 characters would make it difficult to do anything interesting, but check out some of the results. Most are graphic displays, some animated, and with an unsurprising number of nods to 1980s pop culture. Some are truly impressive, though, like Conway’s Game of Life written by none other than Eben Upton.

The COVID-19 pandemic is causing all sorts of cultural shifts, but we didn’t expect to see much change in the culture of a community that’s been notoriously resistant to change for over a century: amateur radio. One of the most basic facts of life in the amateur radio world is that you need a license to participate, with governments regulating the process. But as a response to the pandemic, Spain has temporarily lifted licensing requirements for amateur radio operators. Normally, an unlicensed person is only allowed to operate on amateur bands under the direct supervision of a licensed amateur. The rules change allows unlicensed operators to use a station without supervision and is intended to give schoolchildren trapped at home an educational experience. In another change, some countries are allowing special callsign suffixes, like “STAYHOME,” to raise awareness during the pandemic. And the boom in interest in amateur radio since the pandemic started is remarkable; unfortunately, finding a way to take your test in a socially distant world is quite a trick. Our friend Josh Nass (KI6NAZ) has some thoughts about testing under these conditions that you might find interesting.

And finally, life goes on during all this societal disruption, and every new life deserves to be celebrated. And when Lauren Devinck made her appearance last month, her proud parents decided to send out unique birth announcement cards with a printed circuit board feature. The board is decorative, not functional, but adds a distinctive look to the card. The process of getting the boards printed was non-trivial; it turns out that free-form script won’t pass most design rule tests, and that panelizing them required making some compromises. We think the finished product is classy, but can’t help but think that a functional board would have really made a statement. Regardless, we welcome Lauren and congratulate her proud parents.

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Iceland’s early coronavirus testing model shows 50% of cases have no symptoms



  • Iceland’s coronavirus testing campaign stands out as the country started aggressive COVID-19 screening months ago.
  • Iceland is testing all patients who are at risk or show symptoms, and anyone else who wants to get tested.
  • Current data shows that around 50% of those tested didn’t have symptoms indicative of infection with the novel coronavirus.
  • Visit BGR’s homepage for more stories.

A small island nation of 360,000 inhabitants, Iceland may prove to be a beacon of hope in fighting the novel coronavirus, as well as future viral outbreaks before they reach pandemic levels. The country has made the news a few times in the past few days for its COVID-19 work. Iceland is home to scientists that are at the forefront of genetic innovation, as they’ve been tracing the few mutations of the SARS-CoV-2 pathogen. That data will be useful for bringing the COVID-19 vaccines that are currently in development around the world to market.

Studying the genetics of the virus wouldn’t be possible without an extensive COVID-19 testing campaign, and that’s where Iceland’s approach stands out. The country started testing well before the disease overwhelmed its medical system, and it discovered that around 50% of cases had no symptoms. The early testing campaign also had another side effect on the community, as Iceland didn’t have to impose as strict lockdown measures as other countries.

With 1,364 cases so far, including four deaths, Iceland has an average of 3,745 COVID-19 patients per million. Comparatively, America’s 256,000 cases account for an average of 784 cases per million at the time of this writing. The difference between Iceland and other countries is that testing started much earlier.

Testing started in early February, weeks before its first coronavirus death, deCODE founder Dr. Kári Stefánsson told CNN. Additionally, officials have conducted an aggressive contact-tracing campaign aiming to quarantine all suspected COVID-19 cases.

“The only reason that we are doing better is that we were even more vigilant,” Stefánsson said. “We took seriously the news of an epidemic starting in China. We didn’t shrug our shoulders and say, ‘this is not going to be anything remarkable.’”

Iceland’s COVID-19 statistics show that some 1,024 people are in isolation, 45 are hospitalized, and 12 people are in the ICU. More than 10,200 suspected contacts have completed the quarantine, while 6,300 more are in quarantine as of this writing. In total, Iceland tested more than 22,000 people and aims to test 50,000 more. The National University Hospital examines people who are high-risk or have shown symptoms, CNN explains. But nearly half of testing has been done by deCODE, and anyone who wants to get tested can be.

While fewer than 1% of the tests the biotech company performed came back positive, around 50% of those who tested positive were asymptomatic. This finding supports other studies that say presymptomatic, asymptomatic, and those that are mildly symptomatic are active carriers of the virus, helping it spread.

“What it means in my mind, is that because we are screening the general population, we are catching people early in the infection before they start showing symptoms,” Stefánsson said.

The data also indicates that the more than 1,050,000 confirmed cases globally do not paint a complete picture. There may be hundreds of thousands of infected people who can’t be tested because there aren’t enough tests or because they don’t qualify.

Some might find Iceland’s success easy to dismiss, given the size of the country. But the protocols the country put in place can apply to any community. Early testing and contact-tracing could flatten the curve before social distancing measures need to be deployed. Iceland has limited gatherings over 20 people, but the country isn’t under lockdown.

“It’s nothing to do with the size of the population, this has to do with how well prepared it was,” Stefánsson said, adding that many developed countries could have mounted similar efforts, but “behaved like nothing was happening.”

Iceland isn’t the only country using testing to attempt to stay ahead of the illness. South Korea has been able to drastically flatten the curve by COVID-19 screening and drastic contact tracing campaigns. Germany’s aggressive testing allowed it to register 85,000 cases, or around 1,033 cases per million. But Germany caught these cases early on, which helped it reduce the mortality rate significantly compared to other EU states.

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