4S eSIM vs LightSim

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

4SLightSim

Unlimited data ✓ Yes ✓ Yes

Regional bundles ✓ Yes ✓ Yes

Global bundles (50+ countries) ✓ Yes No

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 LightSim

ID verification

4S: Not confirmed yet

LightSim: Not confirmed yet

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.

LightSim: 14-day refund window from date of purchase; LightSim reviews requests within 24 hours. Available for technical inability to deliver the service, activation failures, device incompatibility, duplicate/incorrect charges, or an accidental purchase that was never activated/used. Not available once the plan has been used, has expired, or its disclosed usage/validity/fair-use limits have been reached.

Validity starts

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

LightSim: Plan validity starts only when you activate the eSIM at your destination, not at the time of 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.

LightSim: Selected plans are a fixed high-speed data allowance per day (shown per plan) rather than a fixed total; hotspot/tethering sharing is unlimited (no separate cap or speed limit) on every plan.

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.

LightSim: Top up your existing plan directly in the app in seconds - no need to reinstall the 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.

LightSim: Not confirmed yet

Billing currency

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

LightSim: Not confirmed yet

Support

4S: Email · Live chat · Help center

LightSim: Live chat · Email · 24/7, average reply under 5 minutes

Payment

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

LightSim: Not confirmed yet

Headquarters

4S: Kowloon, Hong Kong

LightSim: Tallinn, Estonia

Legal entity

4S: Wans Technology Limited

LightSim: TeleXchange System OU (Estonia, Registry Code 11428965)

Founded

4S: Not confirmed yet

LightSim: Not confirmed yet

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

LightSim -10% ESIMKART10

4S eSIM vs LightSim — common questions

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

Compare 4S eSIM and LightSim by destination

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