Is it a phone, a tablet - or both?
In the battle for tech supremacy, the Chinese Telecoms giant Huawei has launched a foldable smartphone - just days after rival Samsung unveiled a similar device.
The Mate X is a 5G device that can fold into a slim 16.76 centimetre smartphone and unfold into a 20.3-centimetre tablet.
Huawei launched the phone at the Mobile World Congress in Barcelona on Sunday.
But despite its slimline size, you will still need deep pockets.
The Mate X will start at 2,299 Euros. It's expected to go on sale in the middle of the year.