4S eSIM eSIM Data Plans for Southeast Asia

4S eSIM does not provide a truly unlimited data eSIM for Southeast Asia. All of its plans have a hard data cap; the “Unlimited” label in the plan names only indicates that the high‑speed data is available until the cap is reached, after which the speed is reduced to 1000kbps.

Travelers who need a large amount of data can choose from the fixed data plans that 4S eSIM offers. For example, the Asia+ 50GB – 90 days plan gives 50GB of high‑speed data for 90 days, and the Asia+ 50GB Unlimited – 30 days plan also provides 50GB of data but applies the reduced speed after the limit is reached. These fixed data plans can be more cost‑effective for most users unless they require an extremely high data volume.

4S eSIM does not offer any Southeast Asia eSIM plans that include a phone number or SMS capability. The provider only supplies data‑only eSIMs, so travelers will not receive an active mobile number or the ability to send or receive traditional SMS text messages.

If a traveler needs to communicate while abroad, popular VoIP applications such as WhatsApp, Telegram, or iMessage can typically be used over the data connection for voice calls and messaging. However, some destinations may block or restrict these services, so users should verify that the apps they rely on are accessible in Southeast Asia before purchasing a plan.

The Asia+ plan covers Indonesia, Malaysia, the Philippines, Singapore, Thailand and Vietnam, while the Global plan covers the same countries in addition to Cambodia.