http://www.truemove.com/en/Call-ChillChill-50Satang-per-minute-condition-1.rails

3.3 Sending text message (SMS) to any network throughout 24 hours is charged at 3 Baht per message (excluding VAT and rate after VAT is 3.21 Baht per message). This rate is used with messages sent to mobile numbers used or registered in Thailand only which excludes special message service;