Is my SouthESIM plan for Mayotte also valid for the Comoros Islands?

That's an important distinction to make! While Mayotte is geographically close to the Union of the Comoros, they are separate countries with distinct telecommunication networks. Your SouthESIM plan specifically designed for Mayotte will work only within Mayotte (France). If your travel plans include visiting other islands in the archipelago, such as Grande Comore or Anjouan, you'll need a separate eSIM plan for those destinations. SouthESIM offers regional or country-specific plans, so you can easily pick up another budget-friendly eSIM to stay connected across borders.