HummingBad Android malware: who did it, why, and is your device infected?

Android malware created by a Chinese advertising company has put as many as 85m devices at risk - here's everything you need to know about it

When researchers revealed that a Chinese advertising company had created one of the most pernicious pieces of Android malware yet, they estimated it has infected 10m Android handsets worldwide.

Dubbed "HummingBad" by researchers at the security firm Check Point, it's a one of the biggest attacks to date on Android - the world's most popular mobile operating system, which runs on more than 80% of all smartphones as well as tablets.