Data Plans for Asia Travel: eSIM vs Local SIM vs Pocket WiFi

Three options, one clear winner for most travelers

Getting data in Asia used to mean hunting for SIM cards at airports in countries you don’t speak the language of. The eSIM revolution has simplified this enormously — install before you fly, activate on landing, done. Here’s the comparison. — book a Yesim eSIM in advance for the best price.

eSIM: the modern default

Airalo is the most widely used eSIM provider for Asia travel — plans for individual countries or multi-country Asia regional packages. Country plans: Japan 1GB for $4.50, Thailand 3GB for $8, Vietnam 3GB for $6. Asia regional plans: 10GB for $30 covering 15+ countries. Works on iPhone XS or later, most modern Android flagships. Saily is a newer alternative with competitive pricing. Install before departure, activate on arrival — no hardware swapping, no queuing.

Local SIM: best for extended single-country stays

For 2+ weeks in one country, a local SIM often provides better value and speeds. Thailand’s AIS 30-day unlimited for $15. Japan’s IIJmio 15GB for $30. Indonesia’s Telkomsel tourist SIM for $10. Available at airports and convenience stores. The downside: swapping SIMs between countries is inconvenient, and language barriers occasionally complicate setup.

Pocket WiFi: for groups and non-eSIM phones

Renting a pocket WiFi router (typically $5–10/day, available at airports) shares a data connection across multiple devices. Good for families or groups. The downside: another device to carry and charge. Available through Klook for Japan, Thailand, and other major destinations.