4S eSIM vs Simsima

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

4SSimsima

Unlimited data ✓ Yes ✓ Yes

Regional bundles ✓ Yes No

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 Simsima

ID verification

4S: Not confirmed yet

Simsima: 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.

Simsima: Full refund if the eSIM hasn't been installed/activated, there's a technical failure on Simsima's side, or the wrong plan was delivered — not available once installed and connected to a network.

Validity starts

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

Simsima: Starts when the eSIM first connects to a network in the destination country, not at installation — you can install days or weeks ahead without losing validity.

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.

Simsima: No fair-use throttling on Unlimited plans — full speed for the entire validity period; only real network conditions may vary speed.

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.

Simsima: Add more data anytime from your Simsima account without reinstalling 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.

Simsima: Free, unlimited eSIM profile reinstallation if the eSIM is accidentally deleted.

Billing currency

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

Simsima: Charges in your local currency when supported (USD, AUD, CAD, EUR, GBP, JPY); otherwise standard bank FX rates/fees may apply.

Support

4S: Email · Live chat · Help center

Simsima: Live chat · WhatsApp · Email · 24/7

Payment

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

Simsima: Card · Apple Pay · Google Pay · Crypto · Alipay

Headquarters

4S: Kowloon, Hong Kong

Simsima: Barcelona, Spain

Legal entity

4S: Wans Technology Limited

Simsima: Simsima SLU

Founded

4S: Not confirmed yet

Simsima: Not confirmed yet

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

Simsima No live code

4S eSIM vs Simsima — common questions

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

Compare 4S eSIM and Simsima by destination

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