Is this EastESIM valid for Malaysia or Indonesia, or just Singapore?

This specific EastESIM plan is designed exclusively for use within Singapore. While many travelers enjoy multi-country itineraries, perhaps combining the urban sophistication of Singapore with the cultural richness of Kuala Lumpur in Malaysia or the beaches of Bali in Indonesia, this particular eSIM will only function within Singapore's borders. For those embarking on a broader Southeast Asian adventure, EastESIM offers excellent multi-country Asia plans that provide seamless connectivity across numerous destinations, so you don't miss a beat from Changi Airport to the streets of Georgetown.