Surface Duo, Galaxy Fold and every dual-screen phone we've seen

Several other brands have tried two-screen phones since 2011. All have failed.

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Jessica Dolcourt is a passionate content strategist and veteran leader of CNET coverage. As Senior Director of Commerce & Content Operations, she leads a number of teams, including Commerce, How-To and Performance Optimization. Her CNET career began in 2006, testing desktop and mobile software for Download.com and CNET, including the first iPhone and Android apps and operating systems. She continued to review, report on and write a wide range of commentary and analysis on all things phones, with an emphasis on iPhone and Samsung. Jessica was one of the first people in the world to test, review and report on foldable phones and 5G wireless speeds. Jessica began leading CNET's How-To section for tips and FAQs in 2019, guiding coverage of topics ranging from personal finance to phones and home. She holds an MA with Distinction from the University of Warwick (UK).
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Jessica Dolcourt
5 min read

The Microsoft Surface Duo phone claims to be totally unique. That's not exactly true.

Sarah Tew/CNET

Microsoft  wants to succeed where  Samsung , LG and others have failed. With the Surface Duo, a dual-screen phone, the software giant wants to make dual-screen phones successful. That is, if Microsoft even acknowledges that the Surface Duo is a phone at all.

Read more: Forget the Galaxy Fold: This zigzagging foldable phone from TCL bends into thirds

The announcement came on Wednesday (along with the announcement of the dual-screen Surface Neo tablet), two years after it said it would no longer make any phone hardware. Although Microsoft's new Surface phone won't be available for a year, the company's commitment to the dual-screen Android device -- nope, it's not a Windows phone -- comes at a time when interest in ultralarge screen phones is on the rise. (By the way, here's how the Surface Duo compares to the Galaxy Fold.)

Microsoft claims that it's building a brand-new category of devices, but that isn't exactly true. While this will be the first dual-screen phone that supports a digital pen -- the Surface Pen -- the Duo is far from the first of its kind. LG's G8X with Dual Screen, for example, offers a similar dual-screen solution with the aid of a case. 

Watch this: Dual screens are the future for Microsoft

But the doomed history of dual-screen phones stretches all the way back to 2011, when Samsung, LG and Kyocera all attempted to expand their phone screens' real estate with a second display. From the ill-fated Kyocera Echo to the E-Ink YotaPhone and 2017's ZTE Axon M, dual-screen phones never quite fulfilled their dual-screen promise. They ranged from gimmicky to downright awkward.

At the very least, Microsoft's involvement with a dual-screen phone and Samsung's Galaxy Fold show phone-makers' continuing drive to deliver double the screen real estate on a device that fits into your bag. 

Will Microsoft be able to make a second screen cool? I have my doubts, but I'd love to see it try.

Microsoft Surface Neo and Surface Duo: Dual-screen prototypes up close

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Samsung Galaxy Fold

The Galaxy Fold may be a foldable phone with a 7.3-inch interior screen, but it's also a dual-screen device, with an outer 4.6-inch display. Our full Galaxy Fold review is almost here, but this one verdict is clear -- that 4.6-inch "cover screen" is too small to comfortably type on and use for more than just a glance, even if whichever app you pick opens into the main screen. Read CNET's Samsung Galaxy Fold review.

Watch this: Every way Samsung improved the Galaxy Fold

ZTE Axon M

ZTE's dual-screen phone connected two 5.2-inch screens together with a hinge to give you a total 6.8 inches of usable space. It was certainly different, often useful and far from boring. 

In 2017 when it launched, the Axon M came closer to achieving the dual-screen dream than the Kyocera Echo (below), which debuted the only side-by-side screen design we know of. ZTE gave its phone four separate modes, including one that lets you watch videos and play games across the two-screen spread. You could also mirror the contents of an app on the second screen, and open two apps at the same time, a boon for incurable multitaskers.

But hardware and software flaws held the phone back. The Axon M was pricey for a device with a so-so camera and the previous year's specs. And its imbalanced battery made it awkward to hold. Read CNET's ZTE Axon M review.

ZTE's Axon M is a flip phone with twice the screens

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Kyocera Echo

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The Echo's home screen stretches out across both of its displays.

Josh Miller/CNET

When it was first announced in early 2011, the idea of unfolding a dual-screen phone into tablet mode was lofty and unprecedented. This is the Surface Duo's true ancestor. 

We actually liked some of the Echo's capabilities -- like turning the bottom 3.5-inch screen into a virtual keyboard while the top screen acted as a browser, or locking both screens together to summon a 4.7-inch map. 

The phone was bulky, however, the central seam was distracting (a potential pitfall for the Surface Duo, too) and the learning process more complicated than usual. 

With otherwise unremarkable features, the Echo sold poorly, and was killed off in under a year, in September 2011. Read CNET's Kyocera Echo review.

LG DoublePlay
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LG DoublePlay

LG's DoublePlay doubled down on screens.

Josh Miller/CNET

LG DoublePlay

A mini screen nestled within a keyboard must have seemed like an OK idea at the time. The DoublePlay wedged a tiny, low-resolution 2-inch touch display in the center of its split keyboard. It alternately showed icons you could press to quickly switch apps, or complementary features that let you do things like typing a message while reading your email on the main display. 

The problems were immediately apparent. The secondary screen split the keyboard into two halves that made it too small to be truly useful and too large to avoid distraction. In the end, we never quite found our stride and the DoublePlay's disappointing battery life further sank its appeal. Read CNET's LG DoublePlay review.

Samsung DoubleTime
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Samsung DoubleTime

The more screens the better, right? Not so for the wacky Samsung DoubleTime.

Sarah Tew/CNET

Samsung DoubleTime

One of the most successful applications of the dual-screen set, this phone had a second 3.5-inch screen on the inside to go with the main screen on the outside. 

There were no tricks to learn or secondary functions. It was just another screen you accessed by opening the phone like a book. 

Still, the added screen-and-keyboard combo thickened the phone, and left us wondering why we would ever really need the inner display. Wouldn't the phone work just as well as a slider? We thought so.

The $50 on-contract price was right (remember two-year contracts?), but an older version of Android at the time (2.2 Froyo) left us cold, when almost all other new Android phones of the day ran the newer Gingerbread-flavored version of Google's mobile software. Read CNET's Samsung DoubleTime review.

Samsung Continuum

The Samsung Continuum had a true ticker display.


Samsung Continuum

Samsung took its original Galaxy phone of the day one step further. The Continuum had a tiny ticker screen at the bottom for RSS updates, weather and social-networking status updates. Customization was limited, typing a bit more cramped and the constant flow of information overwhelming. 

While we came to appreciate the second screen, it never really caught on and we felt we could easily live without it. Read CNET's Samsung Continuum review.

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Remember the YotaPhone? Both it and the YotaPhone 2 slapped a low-power E-Ink display on the back.

Andrew Hoyle/CNET

YotaPhone and YotaPhone 2

In 2013, Russian manufacturer Yota proudly showcased the first handset to use a power-saving E-Ink display on the back side of the typical LCD running Android. 

The YotaPhone intrigued us with its bold design. Would this be the phone to break the dual-screen curse? Alas, no.

It had an interesting, potentially useful concept, but some design and use issues with that second screen ultimately keep it in the realm of likable oddball. The same stood for the improved, but still unconvincing YotaPhone 2 in 2014.


LG's V10's second screen was almost indecipherable from the main display.

Dan Graziano/CNET

LG V10 and V20

The LG V10 and V20 followed the Samsung Continuum's lead with an always-there shortcuts bar. About 2 inches wide and maybe a centimeter tall, this short strip of display all but blended into the phone's bezel. While moderately useful at times, it didn't make much of an impact and LG dropped the screen-on-top-of-its-screen with its most recent model, the LG V30. Read CNET's LG V30 review.

For more on the Surface Duo, read up on how Microsoft's bold tablet-like phone could beat the foldable phone design. And here's everything else Microsoft announced today.

Originally published last week.