4S eSIM eSIM Data Plans for Southeast Asia

4S eSIM’s plans that carry the name “Unlimited” are not truly unlimited in the sense of offering unlimited high‑speed data. Each of those plans has a fixed data cap, after which the speed is throttled to 1000 kbps. For example, the Asia+ 10GB Unlimited - 5 days plan provides 2GB of high‑speed data per day and then reduces speed once the daily limit is reached. The same throttling rule applies to all other “Unlimited” plans listed for Southeast Asia.

If a traveler prefers a high‑capacity fixed data plan without the speed reduction, 4S eSIM offers several options. For instance, the Asia+ 50GB - 5 days plan gives 50GB of full‑speed data for five days, and the Global 20GB Unlimited - 5 days plan offers 4 GB/day of full‑speed data for five days. These plans provide substantial data volumes at a fixed price without the post‑cap speed restriction.

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.