4S eSIM vs InternationalSIM

At a glance

Whole-catalog figures — every active plan each provider sells today.

Price check in popular destinations

The cheapest plan each provider sells for two realistic trip sizes, in the destinations both cover that travelers check most. Every price is a live plan you can buy.

Plan types on offer

4SInternationalSIM

Unlimited data ✓ Yes ✓ Yes

Regional bundles ✓ Yes ✓ Yes

Global bundles (50+ countries) ✓ Yes ✓ Yes

Cruise / at-sea plans No No

Pay as you go No No

Comparison by eSIMKart

Policies compared

Confirmed from each provider's own site — see the trust card on each provider page for the verification date.

4S InternationalSIM

ID verification

4S: Not confirmed yet

InternationalSIM: Not required

Refund policy

4S: Refund eligibility is reviewed case-by-case based on order/eSIM status and reason — no fixed window stated; contact support to request review.

InternationalSIM: 14-day money-back guarantee: full refund if the eSIM QR code has not been scanned or activated, processed to the original payment method in 3–5 business days.

Validity starts

4S: Most plans start counting on first use, when the eSIM connects and begins using data (checked on your 4S service page).

InternationalSIM: Smartstart: plans activate automatically on arrival in a covered destination, with the validity period starting then, not at purchase; unactivated plans expire automatically 6 months after purchase.

Fair-use limit

4S: Unlimited plans include a high-speed data quota for the full validity period; after it is used, speed drops to up to 1 Mbps until the plan expires.

InternationalSIM: Data services are subject to Fair Use Policies set by the local network carrier per InternationalSIM's terms, but no specific data threshold or throttled speed is disclosed.

Top-ups & rollover

4S: Self-serve top-up (same destination/region only) adds high-speed data to the current plan and extends its validity by the top-up package's own validity period.

InternationalSIM: Existing eSIMs and SIM cards can be recharged with more data through the InternationalSIM customer portal without needing a new eSIM.

Lost device / reinstalling

4S: Each eSIM QR/activation code can only be installed once; a deleted eSIM usually cannot be reinstalled with the same code — contact support for a replacement.

InternationalSIM: A new eSIM would be required.

Billing currency

4S: Checkout supports multiple currencies (USD, EUR, GBP, JPY, CNY and others via a currency selector); USD is the default.

InternationalSIM: All InternationalSIM product listings and checkout prices are calculated and charged in EUR (€), including VAT.

Support

4S: Email · Live chat · Help center

InternationalSIM: Email · Phone · Help center · 24/7

Payment

4S: Google Pay · Alipay · Card · PayPal · Crypto

InternationalSIM: Card · PayPal · Apple Pay · Google Pay

Headquarters

4S: Kowloon, Hong Kong

InternationalSIM: Silvolde, Netherlands

Legal entity

4S: Wans Technology Limited

InternationalSIM: No Worries Services (Netherlands, KVK 83771085) -- trades as InternationalSIM and Roam-ON.

Founded

4S: Not confirmed yet

InternationalSIM: 2004

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

InternationalSIM -10% ESIMKART10

4S eSIM vs InternationalSIM — common questions

Figures on this page come from both providers' live catalogs and are re-checked automatically every day.

Compare 4S eSIM and InternationalSIM by destination

Head-to-head prices for the destinations travelers check most.