Japan's NTT DoCoMo will launch international LTE roaming for its mobile customers from the end of March.
The operator has announced plans to introduce outbound LTE roaming in eight countries and regions, including Hong Kong, on March 31.
The other regions are mainland USA, Canada, France, Puerto Rico, Alaska, Hawaii and the US Virgin Islands.
DoCoMo plans to extend roaming to Malaysia in April, and then progressively extend the service to more territories.
The operator will apply its existing flat-rate roaming plans to the LTE roaming services. In November, DoCoMo launched one-day data roaming packs starting at 980 yen ($9.60) for 24 hours of data access.
DoCoMo's partners for the service are Hutchison in Hong Kong, Maxis in Malaysia, Bouygues Telecom in France, Rogers in Canada and AT&T Mobility for the five other markets in the Americas.
Juniper Research this month estimated that mobile roaming will generate $90 billion in revenues worldwide by 2018, up from an expected $57 billion this year.