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.
Compare
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 | 130+ 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
Fuse130+ 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 4 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 130+ 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.
Fuse is a UK multi-network data-only eSIM — one digital SIM that uses all four UK networks (EE, Three, Vodafone, O2) and switches automatically to whichever has the strongest signal. Fuse does not issue a phone number; Honest Mobile Smart SIM does. Most customers keep Honest Mobile Smart SIM for calls and SMS on their existing number, and add Fuse alongside via dual-SIM to handle data.
Yes. Every eSIM-capable phone (most flagships from 2018 onwards) supports dual-SIM — one physical SIM and one eSIM, or two eSIMs. Keep Honest Mobile Smart SIM for calls and SMS, install Fuse as a second eSIM for data. Both lines work at the same time.
No. Fuse is data-only — there is no number, no carrier voice calls, no SMS. Apps like WhatsApp, FaceTime, iMessage and Signal work normally over the Fuse data line. Your existing Honest Mobile Smart SIM number stays where it is.
No — Fuse is rolling monthly. Cancel or change plan any month with no exit fees. Plans start at £5.99/month for Spark (5GB), £9.99 for Pulse (10GB plus roaming in 130+ countries), and £14.99 for Surge (15GB plus roaming).
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