The Mobile World Congress (MWC), the world's biggest mobile fair, will kick off in Barcelona from Monday to Thursday, with 2,300 exhibitors showcasing their latest smartphones, tablets, artificial intelligence devices, autonomous drones and other smart gadgets.

More than 100,000 visitors are expected at the show this year.

Ahead of the show, several vendors, such as Chinese telecommunications companies Huawei Technologies Co Ltd (Huawei) and ZTE Corporation (ZTE), unveiled their new products on Sunday.

Let's take a look at the eye-catching gadgets stealing the spotlight.