ZenSim 0 cheapest rows

4S eSIM vs ZenSim in United Kingdom

Side-by-side pricing for United Kingdom, straight from each provider's current real plans.

Cheapest overall

4S eSIM

8/8 cheapest rows

10 of 12 facts confirmed -15%

Best for: Budget travellers · Unlimited data · Multi-country trips · Short trips

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ZenSim

0/8 cheapest rows

10 of 12 facts confirmed -10%

Best for: Unlimited data · Multi-country trips · No ID check · Long stays

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4S eSIM is the cheapest option in 8 of the 8 price rows for United Kingdom. Live plans from each provider's catalog, re-checked daily.

Prices in United Kingdom

Cheapest live plan from each provider per trip size. Every price links to that exact plan.

	4S	ZenSim
Starting price	$1.19 1GB · 1 days Get eSIM →	$5.00 1GB · 5 days Get eSIM →
1 GB or more	$1.19 1GB · 1 days Get eSIM →	$5.00 1GB · 5 days Get eSIM →
5 GB or more	$2.94 5GB · 1 days 🌍 Regional Also valid in: Austria, Belgium, Bulgaria, Croatia +30 more Get eSIM →	$10.00 5GB · 5 days Get eSIM →
10 GB or more	$5.23 10GB · 5 days 🌍 Regional Also valid in: Austria, Belgium, Bulgaria, Croatia +30 more Get eSIM →	$18.00 10GB · 15 days Get eSIM →
20 GB or more	$9.35 20GB · 5 days Get eSIM →	$26.00 20GB · 15 days 🌍 Regional Also valid in: Albania, Austria, Belgium, Bulgaria +35 more Get eSIM →
Unlimited	$2.38 Unlimited · 1 days 🌍 Regional Also valid in: Austria, Belgium, Bulgaria, Croatia +30 more Get eSIM →	$16.00 Unlimited · 5 days 🌍 Regional Also valid in: Albania, Austria, Belgium, Bulgaria +35 more Get eSIM →
Best price/GB	$0.41	$1.28
Best price/day	$0.02	$0.22

Comparison by eSIMKart

Starting price

$1.19

1GB · 1 days

Get eSIM →

ZenSim

$5.00

1GB · 5 days

Get eSIM →

1 GB or more

$1.19

1GB · 1 days

Get eSIM →

ZenSim

$5.00

1GB · 5 days

Get eSIM →

5 GB or more

$2.94

5GB · 1 days

Get eSIM →

ZenSim

$10.00

5GB · 5 days

Get eSIM →

10 GB or more

$5.23

10GB · 5 days

Get eSIM →

ZenSim

$18.00

10GB · 15 days

Get eSIM →

20 GB or more

$9.35

20GB · 5 days

Get eSIM →

ZenSim

$26.00

20GB · 15 days

Get eSIM →

Unlimited

$2.38

Unlimited · 1 days

Get eSIM →

ZenSim

$16.00

Unlimited · 5 days

Get eSIM →

Best price/GB

$0.41

ZenSim

$1.28

Best price/day

$0.02

ZenSim

$0.22

Comparison by eSIMKart

Networks in United Kingdom

4S: Not listed
ZenSim: Not listed

Plan types sold for United Kingdom

4SZenSim Unlimited data ✓ ✓ Regional bundles ✓ ✓ Global bundles (50+ countries) ✓ ✓ Pay as you go — —

Policies compared

Confirmed from each provider's own site — see the trust card on each provider page for the verification date.

ID verification

4S: Not confirmed yet

ZenSim: 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.

ZenSim: Refunds are not available once the eSIM has been installed or activated, except for a technical failure verified by ZenSim. If a Travel eSIM cannot be used due to device incompatibility, a refund is issued only if it has not been installed/activated on a different device.

Validity starts

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

ZenSim: Validity starts on activation, not purchase — the eSIM auto-activates the first time it connects to the destination network. Must be installed within 12 months of purchase or ZenSim may cancel the order.

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.

ZenSim: Unlimited plans include a fixed daily high-speed allowance (see each plan), then drop to a reduced speed for the rest of that 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.

ZenSim: Every Travel eSIM can be topped up from the ZenSim app — no need to buy a new eSIM.

Support

4S: Email · Live chat · Help center

ZenSim: WhatsApp · Email · Help center

Comparison by eSIMKart

4S vs ZenSim in United Kingdom — common questions

Which is cheapest for United Kingdom?

It depends on the trip size — see the price rows above for United Kingdom.

Who has the cheapest unlimited plan for United Kingdom?

4S eSIM sells the cheapest unlimited plan for United Kingdom at $2.38 (1 day). Unlimited plans carry fair-use limits — see each provider's policy row.

Do these providers require ID verification?

4S eSIM: not confirmed yet. ZenSim: no ID verification required. Confirmed from each provider's own site; rules can vary by destination.

Is there a discount code for United Kingdom eSIMs?

4S eSIM: ESIMKART15 (-15%). ZenSim: ESIMKART (-10%). Codes are re-verified on every catalog sync.

4S eSIM vs ZenSim in United Kingdom

Prices in United Kingdom

Networks in United Kingdom

Plan types sold for United Kingdom

Policies compared

4S vs ZenSim in United Kingdom — common questions

Compare United Kingdom eSIM providers

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Price history

🇬🇧 4S eSIM vs ZenSim in United Kingdom

Prices in United Kingdom

Networks in United Kingdom

Plan types sold for United Kingdom

Policies compared

4S vs ZenSim in United Kingdom — common questions

Compare United Kingdom eSIM providers

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4S eSIM vs ZenSim in United Kingdom