Thailand's True Move and China Mobile have collaborated to launch low-cost international roaming between their respective markets.
The co-operation is the first initiative to come out of the strategic alliance between China Mobile and True Move parent True Corp.
China Mobile made a 5.5 billion yuan ($881 million) investment in True in June as part of this partnership, and subsequently paid 28.6 billion baht for an 18% stake in the company.
True Move customers visiting both Hong Kong and China will be able to switch to China Mobile's networks using their existing SIMs, the Bangkok Postreported.
Customers will need to pay a service charge of 99 baht ($3) per month, then calls from the market will be charged at nine baht per minute, and SMS messages will cost three baht. These rates are at least 80% lower than normal roaming fees, according to the report.
True Move expects the new service to attract around 45,000 new roaming customers in 2015, bringing its total to 245,000. The operator had 26 million mobile customers as of September, including 800,000 4G subscribers.
The operator has also revealed plans to expand its 4G network to cover 80% of the Thai population by April. By this time, the company aims to have over 9,000 4G base stations in operation.