Smartphone makers currently face something of a dilemma-- does one build the front-facing camera in the bezel, or in a notch? The Doogee Mix 4 features an alternative solution, and it involves a sliding mechanism.

The Mix 4 is a 5.9-inch concept device with a display free from both bezels or notches, allowing for a screen-to-body ratio of 97%. It features a dual-layer design, allowing users to reveal the front-facing camera, sensors and even the speaker by simply sliding the bottom layer upwards. As revealed by YouTuber Arun Maini, the mechanism comes complete with a satisfying click when snapped open or closed, even if it means a thicker phone at around 11mm.

Huawei takes to Paris to present the P20 Pro-- a flagship addition to the P20 smartphone line featuring a rear-facing camera with not one, not two, but three lenses.

The result, according to the camera, is an optically-stabilised telephoto camera with either 3x optical or 5x hybrid zoom. One lens is telephoto and snaps with an 8MP sensor, another features a 40MP colour sensor and the final lens provides 20MP monochrome data. Once a photo is taken the phone combines the data from the 3 sensors into a single 10MP shot using a technique Huawei calls "Light Fusion."

Samsung maintains the Mobile World Congress (MWC) tradition as it presents the latest Galaxy smartphone-- the S9 and S9+, a handset featuring what the company claims is the most advanced camera yet.

The S9 should be very familiar to S8 owners, since it features the same 18.5.9 format display, curved sides and glass front and back. The display uses a 2960 1440 resolution Super AMOLED panel, and measures 5.8-inch in the S9 and 6.2-inch in the S9+. A lot of other hardware features remain identical, such as the 3.5mm jack and hardware buttons, including the one used to summon the unloved Bixby assistant.

One notable change from the previous generation is the location of the fingerprint scanner, since it has been moved to below the camera. Another is the speakers, which Samsung claims are stereo, offer 40% louder sound and come complete with Dolby Atmos audio. Inside the IP68-rated body are a Snapdragon 845 processor (or the latest Exynox chipset in some territories), 4/6GB RAM, 64GB storage, microSD slot and 3000/3500mAh battery with fast charging.

Land Rover lends its name to another ruggedised smartphone-- the Explore, a handset the company describes describes as the toughest yet, "built to work in places other phones can't reach."

The work of British smartphone maker Bullitt (who made devices branded by the likes of Caterpillar, Kodak and JCB), the Explore includes a factory-fitted screen protector and protective casing allowing it to survive dives of up to 1.8m in salt water and drops of up to 1.8m. The phone also has an IP86 rating for splash, water and dust resistance, and includes the ViewRanger mapping app for customers wanting to take their Land Rover (the car, not the phone) off the beaten track.