4S eSIM vs Skyalo

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

4SSkyalo

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 Skyalo

ID verification

4S: Not confirmed yet

Skyalo: 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.

Skyalo: Refunds and cancellations are handled case-by-case via support — eligibility depends on whether the eSIM was already installed or used; contact support with your order number.

Validity starts

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

Skyalo: Validity starts either on eSIM installation or on first connection to a supported network, depending on the plan — check the specific plan's activation trigger before installing early.

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.

Skyalo: Daily unlimited plans give a set volume per day at full speed, then unlimited data at a reduced per-plan speed, resetting every 24 hours; other unlimited plans may have speed reduced under Fair Use after heavy traffic.

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.

Skyalo: Many plans support top-ups: buy a top-up plan for the same country or region and the data is added to your existing eSIM profile (each plan shows Top-up Available/Not available).

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.

Skyalo: Most QR codes are single-use: if you delete the eSIM, the same QR code may not reinstall it, so contact support with your order number before deleting or moving it.

Billing currency

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

Skyalo: Bills in USD.

Support

4S: Email · Live chat · Help center

Skyalo: Email · Help center · 24/7

Payment

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

Skyalo: Card · PayPal · Apple Pay · Google Pay

Headquarters

4S: Kowloon, Hong Kong

Skyalo: Not confirmed yet

Legal entity

4S: Wans Technology Limited

Skyalo: Epic Star LLC

Founded

4S: Not confirmed yet

Skyalo: Not confirmed yet

Comparison by eSIMKart

Discount codes

4S -15% ESIMKART15

Skyalo -5% ESIMKART

4S eSIM vs Skyalo — common questions

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

Compare 4S eSIM and Skyalo by destination

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