All 4 UK networks vs 2
Fuse data uses all four UK networks (EE, Vodafone, Three, O2). VOXI runs on Vodafone + Three (post-merger), giving access to 2 of the 4. Fuse adds EE and O2.
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Fuse vs VOXI
Fuse Mobile and VOXI are both eSIM options in the UK. VOXI is a Vodafone sub-brand and — post the Vodafone-Three merger — runs on both Vodafone and Three's networks (2 of the 4 UK networks). Fuse uses all 4 (EE, Vodafone, Three, O2) and automatically picks the strongest. Here's the comparison — all VOXI facts verified from voxi.co.uk on 4 June 2026.
| Feature | Fuse | VOXI |
|---|---|---|
| Product | UK multi-network data-only eSIM | UK mobile service on Vodafone + Three (Vodafone sub-brand) |
| UK networks | All 4 (EE, Vodafone, Three, O2) | Vodafone + Three (post-merger) |
| Multi-network switching | ✓ — across all 4 UK networks | Across 2 (Vodafone + Three) |
| Data — apps you can use | Any app, any service. Standard unrestricted data. | Any app, any service. Standard unrestricted data. |
| Banking, social, streaming, VPN, gaming | ||
| Starting price | From £5.99/mo for 5GB | From £10/mo for 20GB + Unlimited Social |
| International roaming | Included on Pulse and Surge — 130+ countries | European Roaming Pass required (e.g. £2.60 for 1 day) |
| eSIM | ||
| Contract | Monthly rolling, cancel any time | Rolling 30-day |
Product
FuseUK multi-network data-only eSIM
VOXIUK mobile service on Vodafone + Three (Vodafone sub-brand)
UK networks
FuseAll 4 (EE, Vodafone, Three, O2)
VOXIVodafone + Three (post-merger)
Multi-network switching
Fuse✓ — across all 4 UK networks
VOXIAcross 2 (Vodafone + Three)
Data — apps you can use
FuseAny app, any service. Standard unrestricted data.
VOXIAny app, any service. Standard unrestricted data.
Banking, social, streaming, VPN, gaming
Fuse
VOXI
Starting price
FuseFrom £5.99/mo for 5GB
VOXIFrom £10/mo for 20GB + Unlimited Social
International roaming
FuseIncluded on Pulse and Surge — 130+ countries
VOXIEuropean Roaming Pass required (e.g. £2.60 for 1 day)
eSIM
Fuse
VOXI
Contract
FuseMonthly rolling, cancel any time
VOXIRolling 30-day
VOXI data in the table above was verified from VOXI's own published pages on 4 June 2026. Pricing and promotional terms change frequently — please re-check VOXI's website for current details before deciding.
Sources: SIM-only plans·Network (Vodafone + Three)·eSIM support
Why Fuse
What Fuse offers.
Strongest signal wins
Fuse scans all four networks continuously and moves to whichever is strongest in under a second. VOXI relies on Vodafone+Three coverage where you are.
No EE or O2 dead zones
Areas where EE or O2 have stronger coverage than Vodafone/Three — your data goes weak on a VOXI plan. Fuse switches automatically.
Roaming included, no daily pass
Fuse Pulse and Surge plans include data in 130+ countries with no extra fee. VOXI requires a European Roaming Pass before you can roam — daily/weekly passes from £2.60.
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; VOXI does. Most customers keep VOXI 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 VOXI 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 VOXI 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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