ASEAN is home to some of the biggest smartphone markets in the world – a key advantage given mobile devices account for 40 percent of global e-commerce transactions, according to a February report from Criteo. In Indonesia, the world's fourth-most populous country, smartphone penetration is around 23 percent, compared with 18 percent in India, Nielson data shows. In more developed economies like Singapore, that figure jumps to 85 percent – the highest rate in the world.