Chinese smartphone maker Vivo, is set to enter the fast-growing smartphone market in India with the launch of the much-awaited Vivo X5Max on December 15th, the company announced. The upcoming phone is touted as the slimmest smartphone in the world. The company had announced the move last week and has now sent media invites for an event scheduled to be held on December 15 in New Delhi, where it will unveil the Vivo X5Max. The phone appeared online on Chinese certification agency TENAA's website where it's hardware specifications were also revealed. The phone measures 4.75 mm, and is 0.10 mm thinner than Oppo R5, believed to be the world's slimmest smartphone. According to a listing on a certifications website, the phone boasts of a 5.5-inch display with full HD screen resolution. It is powered by a 1.7 GHz octa-core Mediatek processor paired with 2 GB of RAM and 16 GB of expandable internal storage, the phone runs Android 4.4 KitKat. It sports a 13 MP rear camera and a 5 MP front-facing camera. The phone is expected to support all major connectivity options including 4G TD-LTE, offering support for Indian 4G bands. Gionee's Elife S5.5 was considered the world's slimmest smartphone before the launch of Oppo R5, which measures just 4.85 mm in thickness. Interestingly, both Oppo and Vivo are owned by BBK Electronics.