Choosing a mobile network in the UK can be surprisingly difficult. There are the big names such as EE, O2, Vodafone and Three, alongside a growing number of alternatives offering cheaper SIM-only plans and flexible contracts.
One of those alternatives is iD Mobile, the network operated by Currys. In 2026, iD Mobile continues to focus on affordable SIM-only plans, 4G and 5G connectivity, flexible contracts, data rollover and inclusive roaming.
But is iD Mobile actually worth considering for your next mobile plan?
In this iD Mobile review, we’ll look at its plans, network coverage, 5G, roaming, data rollover, pricing, flexibility, and the things you should consider before switching.
What Is iD Mobile?
iD Mobile is a UK mobile network brought to you by Currys. It offers SIM-only plans, pay-monthly phones and SIM-free devices.
The network has historically operated using Three’s network infrastructure. Following the June 2025 merger between Three UK and Vodafone UK, iD Mobile says its customers can benefit from the new VodafoneThree network, with devices able to connect to both Vodafone and Three infrastructure as the network develops.
This gives iD Mobile an interesting position in the UK market: it combines relatively low-cost plans with access to a major UK mobile network infrastructure.
iD Mobile SIM-Only Plans in 2026
One of the biggest reasons people consider iD Mobile is its SIM-only pricing.
At the time of writing, iD Mobile’s advertised SIM-only plans include options ranging from 6GB for £6 per month to unlimited data for £18 per month on selected one-month plans. There are also 12-month and 24-month options with larger data allowances.
Examples currently advertised include:
| Data | Example monthly price | Contract |
|---|---|---|
| 6GB | £6 | 1 month |
| 40GB | £8 | 1 month |
| 80GB | £10 | 1 month |
| 120GB | £12 | 1 month |
| 200GB | £14 | 1 month |
| 250GB | £15 | 1 month |
| 300GB | £16 | 1 month |
| Unlimited | £18 | 1 month |
Longer contracts can offer different pricing and promotional discounts, so it’s worth checking the total cost rather than looking only at the headline monthly price.
All of these plans include unlimited UK minutes and texts, while iD Mobile also advertises eSIM support on its SIM-only plans.
Important: Mobile deals change regularly. The prices above are examples of offers displayed by iD Mobile at the time of writing, rather than guaranteed long-term prices.
No Annual Price Rises on SIM-Only Plans
One particularly useful feature in 2026 is iD Mobile’s SIM Only Price Lock.
The company says its SIM-only plans are not subject to annual CPI or RPI price increases, subject to the applicable terms and conditions.
This can make budgeting easier because your advertised monthly plan price isn’t automatically increased through the usual annual inflation-linked mechanism.
For anyone comparing mobile plans, it’s worth checking whether competing deals include annual price increases before comparing their headline monthly prices.
5G on iD Mobile
If you’re buying a new SIM in 2026, 5G is probably one of the features you’ll want.
iD Mobile offers 5G on compatible SIM-only plans at no additional charge. You need a compatible handset and suitable 5G coverage in your location.
The network has also been undergoing changes following the VodafoneThree merger. iD Mobile says customers can benefit from network improvements, including increased coverage and capacity, as VodafoneThree upgrades its infrastructure.
However, mobile coverage is highly location-dependent.
A network that performs extremely well in one part of the UK may perform differently somewhere else. Before switching, check coverage at your home, workplace and other places you regularly visit.
Ofcom also recommends checking both coverage and network performance when comparing mobile packages.
How Good Is iD Mobile Coverage?
Coverage is one of the most important things to investigate before signing up.
iD Mobile currently advertises 4G and 5G coverage across the UK and says its network improvements following the VodafoneThree merger can provide broader coverage.
The company also states that 4G coverage reaches 99% of the UK population through the Three network, although actual availability and performance depend on location, device and other conditions.
That distinction matters.
Population coverage doesn’t necessarily mean you will get the same experience inside your house, office or local area.
Before buying, use the iD Mobile coverage checker and, where possible, compare coverage with your existing network.
Data Rollover: One of iD Mobile’s Useful Features
Do you regularly finish the month with unused data?
iD Mobile’s Data Rollover could be useful.
Unused monthly data can roll over into the following month and is used before your new monthly allowance. Rollover data expires after one month.
For example, if your plan gives you 40GB and you only use 25GB, the unused 15GB can roll over to the following month, subject to the plan’s terms.
This can be particularly useful for people whose data usage changes from month to month.
Inclusive Roaming in 50 Destinations
Roaming is another area where iD Mobile puts considerable emphasis.
According to iD Mobile, all its plans include inclusive roaming in 50 destinations, allowing customers to use their inclusive UK minutes, texts and data while travelling in those destinations. A 30GB monthly roaming data limit applies under its Fair Usage Policy.
This can be useful for people who travel regularly, particularly when compared with plans that charge additional daily roaming fees.
However, don’t assume every country is included. If you’re travelling outside the included destinations, check the applicable roaming rates or available add-ons before you travel.
Bill Capping
Unexpected mobile charges can be frustrating, particularly when you’ve used all your included data.
iD Mobile provides a Bill Cap feature designed to help customers control additional spending. The company says the feature is available across its plans.
This gives customers another way to manage their monthly spending and reduce the risk of unexpectedly high bills.
Can You Keep Your Existing Mobile Number?
Yes.
If you’re switching to iD Mobile and want to keep your existing number, you can request a PAC code from your current provider.
iD Mobile says you can request your PAC by texting PAC to 65075, then provide the code when setting up your new plan.
This makes switching relatively straightforward if you’re happy with your existing phone number.
iD Mobile Pros and Cons
Pros
- Competitive SIM-only pricing
- 4G and 5G available
- Unlimited minutes and texts on advertised SIM-only plans
- Data rollover
- Inclusive roaming in 50 destinations
- eSIM availability
- Bill capping
- SIM-only plans without annual CPI/RPI price increases
- Flexible one-month options are available
- Access to the evolving VodafoneThree network
Cons
- Coverage and performance vary by location
- Roaming outside included destinations may cost extra
- Promotional prices can change
- Some features require a compatible handset
- Network changes following the VodafoneThree merger are still developing
- Not every user will necessarily get the same speeds or coverage
iD Mobile vs Traditional Big Networks
One of the main attractions of iD Mobile is that you don’t necessarily have to pay a premium simply because you’re using a major network infrastructure.
For example, someone who mainly wants:
- plenty of mobile data,
- 5G,
- unlimited calls and texts,
- flexible SIM-only options,
- roaming,
- and predictable monthly pricing
may find that a lower-cost network such as iD Mobile meets their requirements.
On the other hand, if your priority is a specific network’s coverage at your home or workplace, network performance should take priority over the advertised price.
Who Is iD Mobile Best For?
iD Mobile could be worth considering if you fall into one of these categories.
1. People Looking for a Cheap SIM-Only Plan
If you already own a suitable smartphone, a SIM-only plan can be considerably simpler than paying for a new handset and mobile service together.
iD Mobile offers a broad selection of data allowances, from relatively small packages to unlimited data.
2. Heavy Data Users
If you regularly stream video, use social media, hotspot other devices or download large files, iD Mobile’s higher-data and unlimited plans may be worth investigating.
3. Frequent Travellers
The inclusion of roaming in 50 destinations could be particularly useful for customers who regularly travel abroad.
4. People Who Don’t Want Annual Price Increases
The absence of CPI/RPI-linked annual increases on SIM-only plans can make the monthly cost easier to understand when comparing deals.
5. People Who Don’t Always Use Their Full Data Allowance
Data rollover can help prevent unused data from simply disappearing at the end of each billing cycle.
Who Should Think Twice Before Switching?
iD Mobile isn’t automatically the right option for everyone.
If your current network gives you excellent coverage in places where you spend most of your time, switching purely for a cheaper monthly price may not be worthwhile.
Similarly, people who regularly travel to destinations outside iD Mobile’s inclusive roaming countries should check international charges before signing up.
And if you’re purchasing a phone alongside the plan, compare the total contract cost, not just the monthly payment.
Is iD Mobile Worth It in 2026?
iD Mobile has several features that make its SIM-only plans worth considering in 2026.
Its combination of competitive pricing, 5G, data rollover, inclusive roaming, eSIM support, bill capping and no annual CPI/RPI price increases on SIM-only plans gives customers several useful features beyond simply getting mobile data.
The biggest thing to check before switching is still local network performance. Coverage can vary significantly depending on where you live, work and travel.
Rather than choosing a mobile network based solely on price, check the coverage first and then compare the complete cost and features of the available plans.
Final Verdict
iD Mobile is an interesting option for UK customers looking for a flexible and competitively priced mobile plan in 2026.
Its SIM-only range covers different levels of data usage, while features such as data rollover, inclusive roaming and bill capping add flexibility. The availability of 5G and the ongoing VodafoneThree network improvements also make it relevant for customers looking beyond basic 4G connectivity.
However, there is no single mobile network that is perfect for everyone.
Before signing up, check iD Mobile coverage in your area, compare the total cost against other networks, review roaming destinations if you travel, and choose a data allowance based on your actual usage.
If the coverage works well where you need it and the plan fits your budget, iD Mobile could be a practical option to consider for your next mobile plan.
Frequently Asked Questions
Is iD Mobile a real mobile network?
Yes. iD Mobile is a UK mobile network brought to you by Currys.
Does iD Mobile have 5G?
Yes. 5G is available on compatible iD Mobile plans and devices, subject to coverage.
Does iD Mobile offer data rollover?
Yes. Unused data can roll over into the following month, where applicable. The rolled-over allowance expires after one month.
Does iD Mobile include roaming?
Yes. iD Mobile says its plans include roaming in 50 destinations, with a 30GB roaming data limit under its Fair Usage Policy.
Can I keep my existing number when switching to iD Mobile?
Yes. You can use a PAC code to transfer your existing number to iD Mobile.
Does iD Mobile increase prices every year?
iD Mobile currently states that its SIM-only plans are not subject to annual CPI or RPI price increases, subject to the relevant terms.