4S eSIM vs Lempart Flex

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

4SLempart Flex

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 Lempart Flex

ID verification

4S: Not confirmed yet

Lempart Flex: 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.

Lempart Flex: Full refund on request while the eSIM has not been issued, and always in full if it could not be activated in its coverage area through no fault of yours. If you asked for immediate issue at checkout, an issued plan is not refundable; otherwise there is a 14-day withdrawal right, refunded less a proportionate amount for data used.

Validity starts

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

Lempart Flex: Validity normally starts when the eSIM first connects to a network in its coverage area (Terms §6); the plan must be installed within the period stated on it, usually 180 days from 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.

Lempart Flex: Unlimited plans run at full speed up to the daily amount shown on the plan (500 MB to 10 GB), then continue at the stated reduced speed (384 kbps, 512 kbps or 1 Mbps) until the next day.

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.

Lempart Flex: Top-ups are available on most plans; plans marked "no top-up" cannot be extended.

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.

Lempart Flex: Not offered: an eSIM installs once on one phone, and a deleted eSIM cannot be reinstalled (Terms §5).

Billing currency

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

Lempart Flex: Prices are shown and charged in US dollars (Terms §4).

Support

4S: Email · Live chat · Help center

Lempart Flex: Email · Help center · Email support every day; a person replies, usually within one working day.

Payment

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

Lempart Flex: Card · PayPal · Apple Pay · Google Pay · Crypto

Headquarters

4S: Kowloon, Hong Kong

Lempart Flex: Sheridan, Wyoming, United States

Legal entity

4S: Wans Technology Limited

Lempart Flex: Lempart LLC

Founded

4S: Not confirmed yet

Lempart Flex: 2026

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

Lempart Flex -10% ESIMKART

4S eSIM vs Lempart Flex — common questions

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

Compare 4S eSIM and Lempart Flex by destination

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