Is this EastESIM valid for neighboring Asian countries?

This depends entirely on the EastESIM plan you choose! If you've opted for a single-country plan, like for South Korea, your connectivity will be limited to that specific country. However, EastESIM specializes in multi-country Asia regional plans, which are perfect for travelers exploring multiple destinations, such as a trip covering Singapore, Malaysia, and Thailand. These regional plans ensure seamless transitions across borders, meaning you won't lose connection as you travel from Kuala Lumpur to Phuket. Always double-check your plan details to confirm its geographical validity.