As well as emphasizing durability, OnePlus is also touting the size of the Open at just 5.8mm thin when unfolded and weighing as little as 239 grams when choosing the black vegan leather-backed version. (There’s also a glass-backed green version that weighs slightly more at 245 grams.) That’s not quite as svelte as the thinnest and lightest version of the Honor Magic V2, which is 4.7mm thick and weighs 231 grams, nor is it as slim as Huawei’s 5.3mm-thick Mate X3. But the OnePlus Open has beaten Honor’s device to international markets and comes with support for 5G as well as Google’s apps and services, unlike Huawei’s phone.
The inner folding screen of the OnePlus Open measures 7.82 inches, with a resolution of 2440 x 2268, a maximum refresh rate of 120Hz, and a peak brightness of 2,800 nits. It still has a visible crease, but OnePlus says it’s using a teardrop-shaped folding mechanism to minimize its appearance. The screen uses a layer of ultra-thin glass in its construction for durability, and the whole device has an IPX4 rating for resistance against water splashes. (For reference, Samsung’s Galaxy Z Fold 5 has a more durable IPX8 rating, which indicates protection against full submersion.) The Open’s cover display measures 6.31 inches, with the same maximum 120Hz refresh rate, a peak brightness of 2,800 nits, and a resolution of 2484 x 1116.