Is roaming free in Asia with my home SIM card?

It's crucial to understand that free roaming is highly unlikely for most Asian destinations with your home SIM card from the US, UK, or EU. Countries like Japan, South Korea, Thailand, Vietnam, and India are typically considered 'Rest of World' zones by most carriers. This means activating international roaming can lead to extremely high daily charges or per-MB rates, quickly escalating costs. EastESIM provides a far more budget-friendly and transparent solution, connecting you directly to local networks and avoiding those expensive surprise bills, leaving more funds for exploring vibrant markets or delicious street food.