New research by China Mobile Security reveals that China had 1.5 million infected devices last year , followed by India with close to a million and Japan with over 800,000 . Apart from the fact that these countries are home to the largest smartphone user bases , another reason they are worst - hit is that third - party markets are growing in these areas , many of which have been contaminated by viruses due to weak encryption , along with an increased use in online mobile payment methods worldwide . More than 60 percent of viruses are related to mobile payment. The study also revealed the number of Android viruses rose sharply , exceeding 9.5 m , up 22 % YoY.
New research by China Mobile Security reveals that China had 1.5 million infected devices last year , followed by India with close to a million and Japan with over 800,000 . Apart from the fact that these countries are home to the largest smartphone user bases , another reason they are worst - hit is that third - party markets are growing in these areas , many of which have been contaminated by viruses due to weak encryption , along with an increased use in online mobile payment methods worldwide . The study also revealed the number of Android viruses rose sharply , exceeding 9.5 m , up 22 % YoY.