iD Mobile UK – 2025 Review & SIM-Only Deals

Overview

iD Mobile is the subnet/mobile virtual network operator owned by Currys Group Limited that runs on the Three UK network, offering competitively priced SIM-only deals with 5G, flexible contract terms (30-day rolling, 12 or 24 months) and extras like data rollover and inclusive roaming in many destinations.
Their offer makes them a strong contender in the value-segment for UK mobile users.

Network & Coverage

Since iD Mobile operates on Three’s infrastructure, you gain access to a network that covers up to ~99% of the UK population for 4G, and a large 5G rollout in urban areas.
That means for many users iD Mobile delivers very competitive coverage and speed for the price. However, as with all MVNOs, there may be occasional priority differences (especially under network load), so it’s sensible to check your postcode’s coverage via Three’s checker or iD’s site.

Plans & Pricing Structure

a) Contract flexibility & pricing

• iD Mobile offers rolling 30-day SIM-only plans, plus longer contracts for better value.

• Pricing is very aggressive in the budget segment: some plans start at around £6/month for data + unlimited UK minutes/texts.

• Benefits like data rollover, no annual price rises on some deals, and free roaming in ~50 countries are featured.

b) Data allowances & extras

• All plans include unlimited UK calls and texts.

• Data allowances range from low tens of GB up to unlimited data. Promo deals show 8GB for ~£6, 30GB for ~£7 etc.

• Roaming in many countries is included, extras like data rollover and eSIM are supported.

c) Suitability & value

iD Mobile is especially suited for:

• Users who already have a handset and just want a SIM-only deal.

• People looking for large data allowances at budget prices (30GB+, 50GB, Unlimited).

• Travellers or expatriates using roaming in Europe/other supported zones.

• Budget conscious households, students, or those seeking flexibility with no long-term lock-in.

SIM-Only Deals

Who Are These Mobile Plans Best For?

Key details to know

Before switching or ordering a SIM, here are some important details that help you get the most out of Lyca Mobile:

• Carrier & network: iD Mobile runs on the Three network, so you benefit from broad UK coverage and 5G support.

• Contract types: Choose from monthly rolling, 12- or 24-month deals. Rolling gives flexibility; 12/24-month deals often lower price.

• Roaming policy: Data roaming in 50+ destinations is included — but check any fair-use caps for free roaming.

• Data rollover & no price rises: Some plans include data rollover so unused data isn’t lost, and iD emphasises “no annual price rises” on many SIM-only deals.

• Promo vs standard price: Some of the lowest advertised deals may be promotional; always check the ongoing monthly cost and any contract length.

• Support & service: While many customers report good value and reliability, there are mixed reviews on customer support and service experience.

• Switching & number porting: If you keep your existing number, request a PAC from your old provider then insert the new iD SIM — typical porting is within 24 hours.

• Device compatibility: Ensure your phone is unlocked and supports 5G / required bands if using 5G-enabled plans.

Final Verdict

iD Mobile offers excellent value in the UK SIM-only market for 2025. With strong data allowances, unlimited UK calls/texts, bundling of 5G, and flexible contract options, it appeals to everyone from budget-conscious users to data-heavy streamers.

If you’re looking for big data at a reasonable price and can live with a MVNO (rather than premium network), iD Mobile is a smart choice.

👉 Go to iD Mobile deals