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4S 5 cheapest rows KnowRoaming 3 cheapest rows

4S eSIM vs KnowRoaming in Brunei

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

Cheapest overall
4S eSIM
4S eSIM
5/8 cheapest rows
10 of 12 facts confirmed Score 84/100 -15%

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

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KnowRoaming
KnowRoaming
3/8 cheapest rows
8 of 12 facts confirmed Score 62/100 -10%

Best for: Unlimited data · Multi-country trips · Short trips · Long stays

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4S eSIM is the cheapest option in 5 of the 8 price rows for Brunei. The remaining rows go to KnowRoaming. Live plans from each provider's catalog, re-checked daily.

Prices in Brunei

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

Starting price
4S
$3.64
1GB · 1 days
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KnowRoaming
$4.76
1GB · 7 days
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1 GB or more
4S
$3.64
1GB · 1 days
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KnowRoaming
$4.76
1GB · 7 days
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5 GB or more
4S
$14.24
5GB · 1 days
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KnowRoaming
$21.15
5GB · 15 days
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10 GB or more
4S
$28.12
10GB · 5 days
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KnowRoaming
$39.13
10GB · 30 days
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20 GB or more
4S
$53.06
20GB · 5 days
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KnowRoaming
$50.76
20GB · 30 days
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Unlimited
4S
$10.44
Unlimited · 1 days
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KnowRoaming
$7.40
Unlimited · 1 days
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Best price/GB
4S
$2.38
KnowRoaming
$1.90
Best price/day
4S
$0.12
KnowRoaming
$0.68
Comparison by eSIMKart

Networks in Brunei

4S
Not listed
KnowRoaming
Not listed

Plan types sold for Brunei

4SKnowRoaming 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
KnowRoaming: 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.
KnowRoaming: Full refund if the eSIM was never installed or the plan never connected; after that a full or partial refund is discretionary (under 2% of data used, or a fault on their side). Ask within 90 days of purchase and before validity ends; reviewed within 4 working days, paid within 15 calendar days.
Validity starts
4S: Most plans start counting on first use, when the eSIM connects and begins using data (checked on your 4S service page).
KnowRoaming: The plan starts when you first connect in a supported country, not at purchase; validity days count from that first connection and run continuously. It must be started within the 'Activate before' window shown at checkout. Unused data expires with the validity period, no rollover.
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.
KnowRoaming: Unlimited country plans: 5 GB at full speed every 24 hours, then reduced speed until the allowance resets (24h counted from first connection); the Global unlimited plan gets 2 GB a day, then up to 256 kbps. Hotspot use counts against the allowance. Fixed plans stop when the data is used.
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.
KnowRoaming: Top up from My plans in the app or on knowroaming.com: select the plan, tap Top up, choose extra data or days; no new eSIM, nothing to scan, the connection doesn't drop. Optional auto top-up (off by default) charges the saved card when the plan runs low.
Support
4S: Email · Live chat · Help center
KnowRoaming: Live chat · Email · Help center · WhatsApp · 24/7
Comparison by eSIMKart

4S vs KnowRoaming in Brunei — common questions

Which is cheapest for Brunei?

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

Who has the cheapest unlimited plan for Brunei?

KnowRoaming sells the cheapest unlimited plan for Brunei at $7.40 (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. KnowRoaming: not confirmed yet. Confirmed from each provider's own site; rules can vary by destination.

Is there a discount code for Brunei eSIMs?

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

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