What business do I need to open for a mobile phone card in Macao?

International roaming service is needed to go to Macao.

If you are a Unicom user, you can call the operator's online customer service number before departure, directly open the international roaming service, and then activate it in Macau. Generally, it will automatically switch to CTM operator network in Macau, and the tariff will be capped in 25 yuan/day. If you are a domestic mobile user, it is suggested to open the "Macau Day Package" in China Mobile WeChat applet or call online customer service before customs clearance (you need to receive SMS). In addition, you can also buy the "flying pig flow package" in advance on Alipay.