Samsung reveals Galaxy Fold and S10 5G

Galaxy S (2010):
The original S-series handset was released days ahead of Apple's iPhone 4, and had a bigger 4in screen and microSD card slot in its favour.
At that point, its main Android rival was the HTC Desire, and although Samsung's device was lighter, thinner, and had a more powerful graphics processor, some reviewers said it felt less "premium" in the hand than its competitor.
The second-generation device saw its display grow to 4.3in, its rear camera increase in resolution to 8MP, and its processor move over to a dual-core design.
It was praised for allowing owners to unlock it by pressing the home key, rather than having to press a button on top as before. And although some griped that it still felt plasticky, it sold in its millions - helping Samsung overtake Nokia as the world's bestselling mobile phone-maker.
The third-generation model established a trend of including a bigger display but compensating for the growth by shrinking the size of the bezels.
Its innovations included the ability to detect when the screen was being looked at, so as to avoid dimming the image. And it introduced S Voice, allowing users to command music to play and photos to be taken by speaking to it.
Samsung added further touchless controls to the S4, letting owners scroll through text by making eye movements, and accept calls with a hand wave.
A dual-camera feature also created photos that blended together the views from the front and rear lenses.
Some critics found this all to be a bit gimmicky, and although the handset was a hit, there were reports that its sales fell short of Samsung's expectations.
The S5 added a fingerprint scanner, which could be used to authenticate purchases via PayPal.
It also introduced a black-and-white mode to help save battery life. But predictions that the firm would ditch Android for its in-house operating system Tizen proved to be inaccurate.
The S-series split in two in 2015 with a premium-priced Edge version offering a screen that curved round one of its sides.
A metal frame and glass back gave the handsets a more luxury feel, but they ditched water resistance and a microSD slot to make this possible.
The seventh-generation phones looked pretty similar to their predecessors, but restored the ability to dunk them in water and slot in extra storage.
Other improvements centred on the camera with better low-light and autofocus capabilities.
The S8 and larger S8+ ditched the home button, took Samsung's logo off the front and added the virtual assistant Bixby.
They also gained an iris scanner, which was billed as "one of the safest ways" to keep data private.
After scandals involving exploding Note 7s and the arrest of the firm's vice-chairman, the launch helped return the firm to surer footing.
The S9 and S9+ gained new camera features including a super-slow-motion video mode and a variable aperture - allowing owners to control how much light reached the sensor.
AR emojis also allowed users to create animated cartoon characters that looked like them.
But sales were lacklustre, and several months after it was unveiled Samsung acknowledged there had been "resistance" to its price.
Cameras that poke out of the screen and four distinct models mark out the latest generation.
But there are signs Samsung's smartphone dominance is slipping...

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