Thailand’s regulator is ostensibly building a fairer mobile market by calling for four new regional MVNOs to join the fray, but the outcome is more likely to be more specialized mobile services, in areas like luxury travel, rather than reduced ARPUs. Thailand’s population is serviced by three operators; True Corporation, Advanced Info Service (AIS) and the much smaller player National Telecom (NT). The market effectively became a duopoly led by True and AIS, with a combined share of 96% of subscribers, when True Corporation and Total Access Communication (DTAC) merged last year. The True-DTAC merger created Thailand’s largest operator worth $8.6 billion, with about 51 million users, against 43 million for its biggest rival AIS. Thailand’s largest conglomerate CP Group…