True Corporation, through subsidiary TUC, operates 3G on 15 MHz of the 2100-MHz spectrum, plus 15 MHz of the 1800-MHz band, and another 15 MHz of the 850-MHz spectrum under a partnership agreement with concession owner CAT Telecom, a deal due to expire in 2025.
DTAC operates 3G service on 10 MHz of the 2100-MHz spectrum, plus another 10 MHz on the 850-MHz for 3G service, and 25 MHz on the 1800-MHz band for 2G service under a concession with statebacked CAT Telecom.