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Fuse vs iD Mobile

Fuse Mobile and iD Mobile are both eSIM options in the UK. iD Mobile is an MVNO on the merged VodafoneThree network. Fuse is a UK multi-network data-only eSIM that uses all four UK networks (EE, Vodafone, Three, O2) and automatically picks the strongest. Here's the comparison — all iD Mobile facts verified from idmobile.co.uk indexed pages on 4 June 2026.

Product

FuseUK multi-network data-only eSIM
iD MobileUK mobile service on VodafoneThree (MVNO, owned by Currys plc)

UK networks

FuseAll 4 (EE, Vodafone, Three, O2)
iD MobileVodafoneThree (single-MVNO posture)

Multi-network switching

Fuse
iD Mobile

Data — apps you can use

FuseAny app, any service. Standard unrestricted data.
iD MobileAny app, any service. Standard unrestricted data.

Banking, social, streaming, VPN, gaming

Fuse
iD Mobile

Starting price

FuseFrom £5.99/mo for 5GB
iD MobileFrom £5/mo for 1GB

International roaming

Fuse130+ countries on Pulse and Surge
iD MobileRoam Free: 50 destinations, 30GB monthly cap (currently suspended Oct 2024+)

eSIM

Fuse
iD Mobile

Contract

FuseMonthly rolling, cancel any time
iD Mobile30-day, 12-month, or 24-month (no CPI/RPI price rises on SIM-only)

iD Mobile data in the table above was verified from iD Mobile's own published pages on 4 June 2026. Pricing and promotional terms change frequently — please re-check iD Mobile's website for current details before deciding.

Sources: SIM-only deals·VodafoneThree merger explainer·EU roaming + fair use·eSIM support

Why Fuse

What Fuse offers.

All 4 UK networks vs one

Fuse data uses all four UK networks (EE, Vodafone, Three, O2) automatically. iD Mobile is an MVNO on VodafoneThree — your coverage depends on that single MVNO arrangement.

Strongest signal wins

Fuse scans all four networks continuously and moves to whichever is strongest in under a second. iD stays on its single network arrangement — if it's weak in your area, your data stays weak.

Monthly rolling only

Fuse is monthly rolling — cancel any time. iD Mobile offers 30-day SIM-only too (with no CPI/RPI rises) but their longer-term contracts run 12 or 24 months.

Wider roaming reach

Fuse Pulse and Surge plans include data in 130+ countries. iD Mobile's Roam Free covers 50 destinations with a 30GB monthly cap (currently suspended since Oct 2024 per their fair-use page).

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; iD Mobile does. Most customers keep iD Mobile 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 iD Mobile 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 iD Mobile 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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