If you wish to activate your data roaming package at the time of purchasing, your package will be active immediately and expire 24 hours after the activation time. However, if you wish to activate your data roaming package for one day on, for example, 1 June 2017, the package will be activated between 02:00 – 04:00 UTC/GMT+7 and expire at the same time on 2 June 2017.