Source: Simon Hradecky | www.avherald.com

A British Airways Airbus A380-800, registration G-XLEK performing flight BA-208 (dep Jan 20th) from Miami,FL (USA) to London Heathrow,EN (UK), was enroute over the Atlantic Ocean when a passenger travelling on the upper deck and carrying his mobile phone, a Samsung Note 4, in a pocket of his shirt, felt his smartphone was becoming hot, took it out of the pocket, opened the battery cover and saw the battery catching fire. The passenger dropped smartphone and battery onto the floor, where the battery burned into the carpet. Thick smoke developed. The passenger poured some Coke over the smartphone, cabin crew quickly arrived and put the battery into a bucket of water, then secured it in a secure container. The crew continued to London for a safe landing.

The aircraft remained on the ground in London for about 4:50 hours, then departed for flight BA-209 to San Francisco.

Two passengers reported independently about the occurrence, each observed different details of the summarizing narrative above.