Big global international handset makers Nokia, Motorola, and Sony Ericsson, along with Korean players LG Electronics and Samsung Electronics, are in hot pursuit of mobile-phone growth in India, and it turns out with good reason. The emerging economy's white-hot mobile-phone market grew faster than China's for the first time last year—and is on pace to become more than three times as fast in 2007, according to a new study by London-based research firm Wireless Intelligence.