26 May 2021, 04:05 am Microsoft is currently warning Android smartphone users to be more careful when installing unknown apps. However, the tech giant company confirmed that these malicious apps are not published in the official Google Play Store. (Photo : Photo by Atsushi Tomura/Getty Images) A man uses his smartphone on July 16, 2014 in Tokyo, Japan. Only 53.5% of Japanese owned smartphones in March, according to a white paper released by the Ministry of Communications on July 15, 2014. The survey of a thousand participants each from Japan, the U.S., Britain, France, South Korea and Singapore, demonstrated that Japan had the fewest rate of the six; Singapore had the highest at 93.1%.