No app allowlist
Fuse data works with any app or service. No approved-apps list to check before installing something. Whatever you want to use — it just works on standard mobile data.
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Fuse vs Honest Mobile Smart SIM
Both Fuse and Honest Mobile's Smart SIM are UK multi-network data-only eSIMs — no phone number, no carrier voice or SMS, just data that uses all four UK networks. The difference is what you can do with that data. Fuse runs standard unrestricted data on any app. Smart SIM limits data to ~500 approved apps. That's the comparison.
| Feature | Fuse | Honest Mobile Smart SIM |
|---|---|---|
| Product | UK multi-network data-only eSIM | UK multi-network data-only eSIM |
| UK networks | All 4 (EE, Vodafone, Three, O2) | All 4 (EE, O2, Three, Vodafone) |
| Data — apps you can use | Any app, any service. Standard unrestricted data. | ~500 approved apps only (allowlist) |
| Banking, social, streaming, VPN, gaming | ||
| Starting price | From £5.99/mo for 5GB | From £10/mo (rolling) or £45/year (= £3.75/mo) |
| International roaming | 120+ countries on Pulse and Surge | 180+ countries (within the ~500 approved apps only) |
| eSIM | ||
| Contract | Monthly rolling, cancel any time | Monthly rolling or annual prepay |
Product
FuseUK multi-network data-only eSIM
Honest Mobile Smart SIMUK multi-network data-only eSIM
UK networks
FuseAll 4 (EE, Vodafone, Three, O2)
Honest Mobile Smart SIMAll 4 (EE, O2, Three, Vodafone)
Data — apps you can use
FuseAny app, any service. Standard unrestricted data.
Honest Mobile Smart SIM~500 approved apps only (allowlist)
Banking, social, streaming, VPN, gaming
Fuse
Honest Mobile Smart SIM
Starting price
FuseFrom £5.99/mo for 5GB
Honest Mobile Smart SIMFrom £10/mo (rolling) or £45/year (= £3.75/mo)
International roaming
Fuse120+ countries on Pulse and Surge
Honest Mobile Smart SIM180+ countries (within the ~500 approved apps only)
eSIM
Fuse
Honest Mobile Smart SIM
Contract
FuseMonthly rolling, cancel any time
Honest Mobile Smart SIMMonthly rolling or annual prepay
Honest Mobile Smart SIM data in the table above was verified from Honest Mobile Smart SIM's own published pages on 27 June 2026. Pricing and promotional terms change frequently — please re-check Honest Mobile Smart SIM's website for current details before deciding.
Sources: Smart SIM overview·Smart SIM roaming·Plans + pricing
Why Fuse
What Fuse offers.
Your bank, your VPN, your stream
Banking apps, social, streaming, VPNs, gaming, your work tools — all run on Fuse like they would on any normal mobile data connection. Smart SIM's ~500-app allowlist excludes most of these categories.
Standard mobile data
Fuse is positioned for everyday data use. Smart SIM is described by Honest themselves as a back-up data eSIM — useful in that role, but the app restrictions make it impractical as a sole data line.
Roaming on real apps
Pulse and Surge plans include data in 120+ countries on any app. Smart SIM covers 180+ countries but only for the same ~500 approved apps — maps and messaging will work, your bank app might not.
Yes — if you like Honest's all-four-networks idea but not the restrictions. Honest Mobile's Smart SIM is, in their own words, a "back-up eSIM" limited to ~500 approved apps — social media, streaming and VPNs are excluded. Fuse is a UK multi-network data-only eSIM on the same four networks (EE, Three, Vodafone, O2) but with standard unrestricted data — any app works — from £5.99/month, no contract. It's the closest alternative if you want multi-network data as a real data line, not just a backup.
Both are UK multi-network data-only eSIMs across all four networks. The key difference is what the data does: Smart SIM restricts you to ~500 approved apps (no social, streaming or VPN) and is positioned as a backup; Fuse runs standard, unrestricted mobile data on any app. Pricing is comparable — Fuse from £5.99/mo, Smart SIM £10/mo or £45/yr.
No. Honest states Smart SIM is limited to apps that don't use much data — "social media and streaming are off the cards." If you need those on a multi-network eSIM, Fuse's unrestricted data is the alternative.
No — Fuse is rolling monthly. Cancel or change plan any month with no exit fees. Plans: Spark £5.99 (5GB), Pulse £9.99 (10GB + roaming in 120+ countries), Surge £14.99 (15GB + roaming).
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