How much does Unicom charge for international roaming in Bangkok every month?

If only the international roaming function is enabled, there is no monthly function fee, but if it is used under international roaming, it needs to be charged according to the international roaming tariff standard. In Thailand, you choose the local preferential network AIS. Call Chinese mainland (excluding Taiwan, Hong Kong and Macao) 1.86 yuan/min, call roaming place 1.86 yuan/min, answer roaming place 1.86 yuan/min, call Taiwan, Hong Kong and Macao and other countries and regions for 3.86 yuan/min, and send a text message to Chinese mainland (excluding Taiwan, Hong Kong and Macao) for 0.86 yuan. If you choose network DTAC or Truemove locally, call Chinese mainland (excluding Taiwan, Hong Kong and Macao) 4.86 yuan/article, call roaming place 1.86 yuan/article, answer 1.86 yuan/minute, call Taiwan, Hong Kong and Macao and other countries and regions 5.86 yuan/minute, and send a text message to Chinese mainland (excluding Taiwan, Hong Kong and Macao) 0.86 yuan.