4S eSIM vs Cellesim

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

4SCellesim

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 Cellesim

ID verification

4S: Not confirmed yet

Cellesim: 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.

Cellesim: Refunds only for technical failures caused by Cellesim that support can't resolve; locked/incompatible phones, user error (e.g. deleting the eSIM), wrong-device installs and change of mind after delivery are non-refundable.

Validity starts

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

Cellesim: The validity countdown does not start at install - it begins only when the eSIM first connects to the network at your destination, so installing early does not waste days.

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.

Cellesim: Carriers throttle the connection after the high-speed cap (often 5-20GB depending on tier); Plus/Premium tiers keep full speed longer.

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.

Cellesim: Where a top-up is offered for your eSIM, add data from your Cellesim account or app to the same eSIM profile without reinstalling; if none is available you need to buy a new plan.

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.

Cellesim: Deleting the eSIM or installing on the wrong device is treated as non-refundable per terms; no reinstall or device-transfer option is described.

Billing currency

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

Cellesim: Checkout shows a currency selector (for example USD) and displays prices/top-ups in your chosen currency; no specific conversion-fee disclosure was found.

Support

4S: Email · Live chat · Help center

Cellesim: Live chat · Email · 24/7

Payment

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

Cellesim: Card · PayPal · Apple Pay

Headquarters

4S: Kowloon, Hong Kong

Cellesim: Newark, DE, USA

Legal entity

4S: Wans Technology Limited

Cellesim: Cellesim, LLC

Founded

4S: Not confirmed yet

Cellesim: Not confirmed yet

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

Cellesim -10% ESIMKART10

4S eSIM vs Cellesim — common questions

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

Compare 4S eSIM and Cellesim by destination

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