Samsung has unveiled its highly-anticipated foldable phone, which will give users a two-in-one smartphone tablet.

The Korean tech giant unveiled its new Galaxy Fold device, which transitions from a 4.6-inch handset to a 7.3-inch mini-tablet, at the Unpacked Event in San Francisco on Thursday. 

A host of smartphone and wearable products were also revealed, including the company’s flagship Galaxy smartphone, the Galaxy S10 and S10 Plus.

Galaxy Fold

The annual product launch event kicked off by showing the new Galaxy Fold.

When closed, the phone can easily fit in your hand like a traditional phone, but has the ability to open up into a large tablet for watching videos. 

“It’s a smartphone, a tablet and a camera that fits in your pocket,”  Samsung’s head of marketing Justin Dennison said.

The new folding device relies on a hinge down the middle of its flexible display.

It will come in four colours: Black, green, blue and silver.

It has six cameras so users “are always ready to capture the moment no matter which way you hold it or fold it”, Mr Dennison said. 

Samsung announces folding phone with 5G at $1,980 https://t.co/A4NJs5w6BJ pic.twitter.com/vsW2vLgfzs

— Reuters (@Reuters) February 20, 2019

Another feature is “three app multitasking”, which allows users to use three applications at the same time.

“You can watch a YouTube video about Hawaii, text your friend about it and browse travel options at the same time,” Mr Dennison said.

It’s been dubbed as the most powerful smartphone on the market with its 12GB of ram and two batteries, which the company spent several years on developing.

While the local price hasn’t been confirmed yet, in the US it will cost a whopping $US1980 (AU$2765) and will be available from April 26.

Galaxy S10 series

Samsung also announced its 10th series of its flagship Galaxy smartphone, the Galaxy S10 and S10 Plus.

The devices are the successors to last year’s Galaxy S9 and S9 Plus. They are now accompanied by a budget Galaxy S10E, which will directly compete with the iPhone XR. 

The Galaxy S10 and S10+ will have triple cameras and wide-angle lenses.

The Galaxy S10 and S10+ have 6.1-inch and 6.4-inch edge-to-edge screens – and the brightest displays on the market.

The smartphones will also feature the world’s first AMOLED display, which improves contrast ratio for brighter whites and deeper blacks.

The devices will have ultra sonic fingerprint scanners and wireless charging capabilities. 

The 5 biggest announcements from the Samsung Galaxy S10 Unpacked event https://t.co/KIPfye5TXv pic.twitter.com/oTdHjSDcjG

— The Verge (@verge) February 20, 2019

The Galaxy S10 is available in black, white and green, while the Galaxy S10+ is available only in black and white.

A fourth S10 model – available to Telstra customers later in 2019 – will be 5G compatible. There’s no confirmed price at this stage, but Samsung confirmed it would cost more than its premium Galaxy S10+.

In Australia, pricing for the Galaxy S10 starts at $1349 for the 128GB model and $1699 for 512GB model.

The budget S10+ will start at $1499 and $2399 for the 1TB model, while the S10E model will cost $1199.

Galaxy Buds

Samsung also unveiled its new Galaxy Buds – wireless earbuds that will compete with Apple’s Airpods.

The earbuds have adaptive dual microphones and use Samsung’s Bixby AI assistant, which recognise three new languages – Spanish, German and Italian.

All new Galaxy Buds. Sound by AKG, adaptive dual microphones can pick up your voice even in noisy places. All-day comfort. Samsung's Lightest and most compact wireless earbuds. 5 hours of calls or 6 hours of music. #SamsungEvent https://t.co/0gRGLpuODs pic.twitter.com/nVNKBYrkLh

— Gadgets 360 (@Gadgets360) February 20, 2019

They will offer enhanced ambient sound that allows users to hear their surroundings, even while wearing the airbuds.

They come in bright canary yellow, offer up to five hours of calls per charge and six hours of Bluetooth.

The Galaxy Buds are already available for preorder on Samsung’s website at $249.

The tech giant also unveiled its new Galaxy Fit and Galaxy Watch Active. These feature a minimalist design, heart rate monitor and thinner wrist straps than earlier models.