Samsung Electronics is to release a pricey folding smart phone in April that works with the next-generation 5G networks and will cost almost $2,000.
The Galaxy Fold will go on sale on April 26th, Samsung officials said at an event in San Francisco.
The device will have a 4.6-inch display while folded and a 7.3-inch display when unfolded.
Samsung said it worked with Facebook, Google and Microsoft to create special versions of their popular apps to fit the new display.
The device "breaks new ground because it answers skeptics who said that everything that could be done has been done," DJKoh, chief executive of Samsung Electronics, said at the event.
"We are here to prove them wrong."
The device could help Samsung, the world's largest mobile phone maker, compete against rivals such as Apple and China's Huawei, both of which sell premium smart phones.
Samsung launches first foldable 5G ready smartphone pic.twitter.com/i8lbnSLnjD
— RTÉ Business (@RTEbusiness) February 21, 2019
While Huawei gained market share last year, the entire industry saw overall unit sales fall as the Chinese economy struggled toward the end of the year.
Samsung said it had developed new manufacturing processes for the phone's hinge and flexible display to tolerate being open and closed hundreds of thousands of times.
Koh said the aim of the launch was to "to recharge growth for our industry."
Along with the folding phone, Samsung also provided an update to its decade-old Galaxy series of phones, adding new cameras and a 5G version.
The 5G smartphones, both folding and rigid, aim to beat major rivals Apple and Xiaomi market with a next-generation device as Samsung defends a narrowing lead in global handset shipments.
With the 5G versions of its flagships, the Korean electronics maker looks to have beaten Chinese rivals in the 5G race, although the device will operate only on the small number of networks launching later this year.
Apple is not expected to release a 5G smartphone until late 2020.Rival smartphone makers are expected to announce 5G models at next week's Mobile World Congress, the industry's top annual event, in Spain.
Samsung said its 5G handset would be available in the early summer.
The Galaxy 10 series needs to appeal to consumers who are reluctant to upgrade for only incremental technological improvements in performance.
Such reluctance led to the worst-ever year for smartphone sales in 2018.
All of the Galaxy series of rigid phones except the 5G will be available from March 8, with the S10+ priced from $1,000, theS10 priced from $900 and the smaller S10e from $750.
The mainline S10 compares with $999 for Apple's iPhone XS and $858 for Huawei's premium Mate 20 Pro.
Samsung is still the global smartphone market leader with about 19 percent share but it underperformed the market, which was itself down.
Huawei and Apple are vying for second place with about 13 and 12 percent respectively.