Hand holding SIM card

iD Mobile SIM-only deals

iD Mobile SIM only plans on Three's network from £6/month, Data Rollover, free roaming in 50+ countries, 5G included, and no annual price rises. Unlimited UK calls and texts on every plan.

What Is iD Mobile?

iD Mobile is a UK mobile network owned by Currys, one of the UK's biggest electronics retailers. It is what experts call an MVNO, a Mobile Virtual Network Operator, which means it runs on Three's existing network instead of building its own. Because of this, iD Mobile can keep its prices very low while still giving you solid coverage.
The network covers over 99% of the UK outdoor population on 4G, and 5G is available in more than 600 towns and cities across the country. Whether you are in London or a smaller town, chances are you will get a decent signal.

Why Choose iD Mobile SIM-only Deals?

iD Mobile SIM-only deals are popular for good reasons. Here is what stands out:

1

Low monthly prices

Plans start from just £6 per month.

2

Unlimited UK calls and texts

Included on every single plan, no exceptions.

3

5G included at no extra cost

On all compatible plans, no upgrade fee needed.

4

Data rollover

Any leftover data rolls over to next month automatically, no waste.

5

Free roaming in over 50 destinations

Including all EU countries, at no extra charge.

6

Bill capping

Set a spending cap so you never accidentally go over your budget.

7

No annual price rises

On SIM-only contracts, your monthly price is locked in for the full term.

8

Flexible contract options

30-day, 12-month, and 24-month plans available to suit any lifestyle.

Types of iD Mobile SIM-only Plans

30-Day Rolling Plans: If you want full flexibility, a 30-day rolling SIM is perfect. You can cancel or change your plan with just 30 days notice. There is no long-term commitment, which is great if your needs change often or you just want to try iD Mobile before committing.
12-Month Plans: A 12-month iD Mobile SIM-only deal gives you a better balance between flexibility and savings. You pay a lower monthly cost than on a rolling plan, and you still have the freedom to switch after your contract ends.
24-Month Plans: For the biggest monthly savings, a 24-month contract is the way to go. You lock in a low rate for two years. iD Mobile SIM-only plans on 24-month contracts are not subject to annual CPI or RPI price increases, which means no nasty surprises on your bill.

iD Mobile Data Options at a Glance

Data AllowanceBest ForFrom (Monthly)Contract Lengths
1GB – 5GBLight usersFrom £6/mo30-day, 12-month
10GB – 50GBAverage usersFrom £8/mo30-day, 12-month, 24-month
Unlimited DataHeavy usersFrom £15/mo30-day, 12-month, 24-month

← Swipe to see all columns →

Is iD Mobile Any Good?

Yes, and the reviews back it up. iD Mobile holds a 4.3-star rating on Trustpilot from over 60,000 customer reviews. It has also been recognised by Which? for great value and won several industry awards.
The network runs on Three's infrastructure, which was ranked the fastest 5G mobile network in the UK by Ookla Speedtest for the second half of 2025. That means when you pick up an iD Mobile SIM-only deal, you are getting some of the best 5G speeds in the country without paying a premium.
The only things to be aware of are that customer support is online and live chat only (no phone support), and all plans require a standard credit check.

How to Switch to an iD Mobile SIM-only Deal

Switching to iD Mobile is simple and you can keep your existing number. Here is how:

1

Get your PAC code

Text PAC to 65075 from your current phone, you will get a PAC code by text straight away.

2

Compare plans on Switch

Compare all available iD Mobile SIM-only deals and pick your plan by data, contract length, and budget.

3

Enter your PAC code when you sign up

iD Mobile will handle the switch, no need to contact your old provider.

4

Your number moves over

Transfer happens the next working day if submitted before 5:30pm Mon to Fri, with no gap in service.

5

Your new SIM arrives

Usually within 2 to 3 working days via Royal Mail.

Roaming with iD Mobile

One of the biggest perks of iD Mobile SIM-only deals is free roaming in over 50 destinations, more than most UK networks. This includes all EU countries and many EEA destinations. You can use your UK data, minutes, and texts abroad without paying extra, subject to fair usage limits.
If you travel outside these 50 destinations, you can add a roaming bundle through the iD Mobile app.

Data Rollover, Never Waste Your Data Again

Unlike many other networks, iD Mobile lets you roll any unused data from one month into the next. So if you use only 8GB of your 15GB allowance in January, that extra 7GB carries forward to February. This is a genuinely useful feature that saves you money over time.

Compare iD Mobile SIM-only Deals with Switch

At Switch, we pull live deals directly from iD Mobile and other top UK networks so you always see the most up-to-date prices. Our comparison tool lets you filter by data, contract length, and monthly budget, making it easy to find the right plan in minutes.

Whether you want a cheap 1GB plan for light use or an unlimited data deal for heavy streaming, Switch helps you find and compare iD Mobile SIM-only deals alongside plans from O2, Vodafone, EE, Three, SMARTY, giffgaff, and more.

You will not be beaten on price at Switch. Compare iD Mobile SIM-only deals today and start saving.

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FAQs

Whose network does iD Mobile use?

iD Mobile is an MVNO running on Three's 4G and 5G network, covering over 99% of the UK outdoor population, with 5G in 600+ towns and cities. Same coverage as Three direct at a lower price.

How much do iD Mobile SIM only plans cost?
What is Data Rollover on iD Mobile?
Does iD Mobile include free EU roaming?
Does iD Mobile have annual price rises?
Does iD Mobile include 5G?
What is the iD Mobile bill cap?
Can I keep my number when switching to iD Mobile?
What contract lengths does iD Mobile offer?
What happens when my iD Mobile contract ends?
What is iD Mobile's customer rating?

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