Does my CheapESIM Hong Kong plan work in Macau or Mainland China (Shenzhen)?

Your CheapESIM plan is specifically for use within Hong Kong. Even though Macau and Shenzhen (Mainland China) are geographically close and easily accessible, they operate on different telecommunication networks, and Mainland China has its own internet restrictions. If your travel itinerary includes the Greater Bay Area (Hong Kong, Macau, and Mainland China), CheapESIM strongly recommends purchasing a regional eSIM that covers all these destinations. This ensures continuous, cost-effective connectivity and avoids any coverage gaps or unexpected charges.