Well, that didn’t last long. Mere weeks after Huawei declared the Ascend P6 the world’s thinnest smartphone, UMEOX, a China-based smartphone manufacturer, dethroned it with the X5. Leaked nearly a month beforehand but formally unveiled today, the device is both ultrathin and record-breaking: the X5 is only 5.6mm thick. That’s more than a half millimeter thinner Huawei’s P6, which is pretty amazing considering the P6’s 6.18mm thinness, and 1.33mm less thick than Oppo’s R809T, another super-thin phone.

UMEOX didn’t provide much information about the X5’s internals, but did reveal the device is powered by a MediaTek SOC, contains a dual-core CPU, and features a 4-inch LCD panel. UMEOX said it plans to launch the phone in French markets beginning this summer, but mum’s the word when, exactly.