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iD Mobile mobile deals

iD Mobile runs on Three's network offering affordable SIM only plans.

Prices correct as of August 2026. We may earn commission when you click through — this never affects our rankings.

iD Mobile review 2026

iD Mobile is a budget-friendly MVNO owned by Currys, operating on Three's network. It offers both SIM only plans and pay monthly contracts, with deals often sold directly through Currys stores and online. One of its more useful features is data rollover — any unused data at the end of a month carries forward to the next. iD Mobile also promises no mid-contract price rises, which is a meaningful commitment given most major networks now apply annual increases. Plans are typically aimed at people who want affordable coverage with a degree of financial predictability.

Coverage

iD Mobile uses Three's network, which provides strong urban coverage across the UK including solid 4G and growing 5G availability in cities. Three's rural coverage is patchier than EE or O2 — if you regularly travel to remote parts of the country, it's worth using Three's coverage checker first. In cities and commuter areas, Three's coverage is generally reliable.

Pricing

iD Mobile's pricing sits in the mid-range — not the absolute cheapest on Three's network (Smarty often undercuts it for unlimited plans) but competitive for most users. The no-price-rises guarantee adds meaningful long-term value on longer contracts: you know exactly what you'll pay throughout the term. Data rollover also improves effective value — unused data carries forward rather than being wasted at month end.

Roaming

EU roaming is included on iD Mobile plans at no extra cost, covering calls, texts and data across EU member states. This is part of the standard plan rather than an add-on. Outside the EU, separate roaming charges apply — check iD Mobile's website for current rates before travelling further afield.

Key features

Data rollover
Unused data from one month carries over to the next, so if you're on holiday or use Wi-Fi heavily, you don't lose what you've paid for.
No mid-contract price rises
iD Mobile commits to not raising prices during your contract term. You pay what you agreed for the duration.
EU roaming included
Using your plan in EU countries is included at no extra cost, covering calls, texts and data.
Available in Currys stores
For people who prefer to set up their phone in-store rather than online, iD Mobile can be purchased and activated at Currys.

Customer service

iD Mobile is backed by Currys, which means in-store support is available at Currys locations around the UK — an unusual advantage for an MVNO. Online support is available through iD Mobile's website and app. There is no dedicated standalone phone helpline, but the Currys store option provides a more tangible support channel than most budget networks offer.

Who should choose iD Mobile?

iD Mobile suits people who want a no-price-rises plan with a useful data rollover safety net. It's a particularly sensible choice if your data usage is inconsistent from month to month, or if you often work from home and use Wi-Fi rather than mobile data.

Worth knowing

Three's rural coverage is the main limitation — if you live or regularly travel outside cities, check coverage carefully. iD Mobile is also not the cheapest option for very large data allowances when compared against Smarty or other Three-based MVNOs.

Verdict

iD Mobile is a well-considered choice for anyone who wants a no-surprises plan without paying major network prices. Data rollover and the no-price-rises commitment are genuine practical advantages, and the option to visit a Currys store for help sets it apart from other MVNOs. Three's coverage is the variable to check — strong in cities, patchier in rural areas. If you're in a coverage area that suits Three and you want value with some financial predictability, iD Mobile is a strong contender in 2026.

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Frequently asked questions

Is iD Mobile any good in 2026?
Yes. iD Mobile is a solid mid-range option on Three's network, with standout features including data rollover and a no-mid-contract-price-rises guarantee. It's available in Currys stores, which is a practical support advantage over purely online MVNOs. The main consideration is Three's rural coverage, which is patchier than EE or O2.
What network does iD Mobile use?
iD Mobile runs on Three's UK network, giving you Three's 4G and 5G coverage. Three has strong urban coverage but weaker rural signal than EE or O2, so check Three's coverage map for your area.
Does iD Mobile roll over unused data?
Yes. Any data you don't use in a given month automatically carries forward to the following month. There's no manual action needed — it happens automatically on both SIM only plans and phone contracts.
Does iD Mobile have annual price rises?
No. iD Mobile commits to not raising prices during your contract term. This is a meaningful difference from EE, O2, Vodafone and Three, which all apply annual inflation-linked increases on most plans.