A new smartphone that is thinner than a pencil has gone on sale in the U.S., Digital Spy reported.

At just 5.5mm thin, the Blu Vivo IV has made it into the Guinness Book of Records.

The device uses Android 4.2 Jelly Bean - which will apparently be upped to 4.4 KitKat soon - and is supported by a 1.7GHz Octa-core processor, 2GB of RAM and ARM Mali 450 graphics.

It features a 5-inch 1080 x 1920 Super AMOLED display with 440ppi, as well as a 2,300mAh battery and 16GB of internal storage. There is no microSD slot for extra storage.

Meanwhile, a 13-megapixel camera is fitted on the rear and a 5-megapixel snapper with 95-degree wide angle lens is found on the front.

The Blu Vivo IV is now on sale in the U.S. for $299.