Editing Smartphone (section)

===Foldable smartphones===
{{main|Foldable smartphone}}

Smartphones utilizing [[Rollable display|flexible displays]] were theorized as possible once manufacturing costs and production processes were feasible.<ref>{{Cite web|url=https://www.smh.com.au/technology/bendable-smartphones-arent-coming-anytime-soon-20131213-2zbtq.html|title=Bendable smartphones aren't coming anytime soon|last=King|first=Ian|date=2013-12-15|website=The Sydney Morning Herald|access-date=2019-02-05}}</ref> In November 2018, the startup company Royole unveiled the first commercially available [[foldable smartphone]], the Royole FlexPai. Also that month, Samsung presented a prototype phone featuring an "Infinity Flex Display" at its developers conference, with a smaller, outer display on its "cover", and a larger, tablet-sized display when opened. Samsung stated that it also had to develop a new polymer material to coat the display as opposed to glass.<ref>{{Cite web|url=https://www.theverge.com/2018/11/8/18074838/samsung-foldable-phone-infinity-flex-display-technology-report|title=The foldable phones are coming|last=Warren|first=Tom|date=2018-11-08|website=The Verge|access-date=2019-02-05}}</ref><ref>{{Cite web|url=https://www.theverge.com/circuitbreaker/2018/11/5/18067116/royole-flexpai-flexible-display-foldable-smartphone-tablet-pricing-features-release-date|title=We tried the world's first folding phone, and it actually works|last=Statt|first=Nick|date=2018-11-05|website=The Verge|access-date=2019-02-05}}</ref><ref>{{Cite web|url=https://www.theverge.com/2018/11/7/18072514/samsung-foldable-phone-screen-features-photos-sdc-2018|title=This is Samsung's foldable smartphone|last=Warren|first=Tom|date=2018-11-07|website=The Verge|access-date=2019-02-05}}</ref> Samsung officially announced the [[Samsung Galaxy Fold|Galaxy Fold]], based on the previously demonstrated prototype, in February 2019 for an originally-scheduled release in late-April.<ref name="ars-galaxyfold">{{Cite web|url=https://arstechnica.com/gadgets/2019/02/samsungs-foldable-phone-is-finally-official-meet-the-galaxy-fold/|title=Samsung's foldable phone is finally official—meet the Galaxy Fold|last=Dunn|first=Jeff|date=2019-02-20|website=Ars Technica|language=en-us|access-date=2019-02-23}}</ref> Due to various durability issues with the display and hinge systems encountered by early reviewers, the release of the Galaxy Fold was delayed to September to allow for design changes.<ref>{{Cite web|url=https://www.theverge.com/2019/9/5/20850693/samsung-galaxy-fold-hands-on-ifa-2019-fixed-display-hinge|title=How Samsung fixed the Galaxy Fold|last=Warren|first=Tom|date=2019-09-05|website=The Verge|language=en|access-date=2020-02-25}}</ref>

In November 2019, Motorola unveiled a variation of the concept with its re-imagining of the [[Motorola Razr (2020)|Razr]], using a horizontally-folding display to create a [[Clamshell design|clamshell]] form factor inspired by its previous [[Motorola Razr|feature phone range of the same name]].<ref>{{Cite web|url=https://www.theverge.com/2019/11/13/20963294/motorola-razr-new-foldable-smartphone-android-hands-on-flip-phone-photos-video|title=Motorola resurrects the Razr as a foldable Android smartphone|last=Gartenberg|first=Chaim|date=2019-11-13|website=The Verge|language=en|access-date=2020-02-25}}</ref> Samsung would unveil a similar device known as the [[Galaxy Z Flip]] the following February.<ref>{{Cite web|last=Dolcourt|first=Jessica|title=Samsung Galaxy Z Flip's foldable glass screen: Already more impressive than the Razr|url=https://www.cnet.com/news/samsung-galaxy-z-flips-foldable-glass-screen-already-more-impressive-than-razr/|access-date=2021-05-26|website=CNET|language=en}}</ref>