4S eSIM vs Simbye

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

4SSimbye

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 Simbye

ID verification

4S: Not confirmed yet

Simbye: 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.

Simbye: Full refund for an eSIM not installed, activated or used if requested within 30 days of purchase; partial or full refund if it doesn't work because of Simbye or the network, even after installation. Applied top-ups 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).

Simbye: Plan validity (7–90 days) starts when the eSIM connects to a network at your destination; until then the eSIM stays valid for 180 days. Some plans, such as the US eSIM with a phone number, start at 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.

Simbye: Unlimited plans include 2GB of high-speed data per day, after which speeds are reduced until the next 24-hour cycle.

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.

Simbye: Top up on the top-up page or in your account with your order number: buy a new data package and the same eSIM reactivates instantly, no reinstall needed.

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.

Simbye: No transfer or reissue to another device: once installed and activated, the eSIM stays tied to that phone, and a new phone needs a new eSIM.

Billing currency

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

Simbye: Charged in the currency shown at checkout: local currency in most European markets (EUR, GBP, CHF, PLN, SEK and others), USD everywhere else.

Support

4S: Email · Live chat · Help center

Simbye: Live chat · Email · Help center · 24/7 support; email Mon–Fri 9:00–18:00, reply within 24 hours

Payment

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

Simbye: Card · PayPal · Apple Pay · Google Pay · Crypto

Headquarters

4S: Kowloon, Hong Kong

Simbye: Sheridan, Wyoming, USA

Legal entity

4S: Wans Technology Limited

Simbye: Simbye LLC

Founded

4S: Not confirmed yet

Simbye: 2023

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

Simbye -15% ESIMKART15

4S eSIM vs Simbye — common questions

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

Compare 4S eSIM and Simbye by destination

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