From spec sheet, i can find the frequency band for these countries.
431.0 – 437.0 MHz (U.S.A., Canada, Mexico, Brazil)
868.125 – 869.850 MHz (Europe, U.A.E.)
868.125 – 868.475 MHz (China, Singapore)
865.5 – 866.5 MHz (India)
312.3 – 314.8 MHz (Japan)
433.05 – 434.79 MHz (Hong Kong, Macau)

How about Thailand, Indonesia & Vietnam?