iD Mobile SIM-only deals are a strong choice if you’re looking for flexible, low-cost plans with useful features like data rollover. Running on Three’s network, iD Mobile offers solid UK coverage along with access to 4G and 5G where available. With a mix of 30-day, 12-month and 24-month plans, iD Mobile gives you the option to prioritise flexibility or lock in a lower monthly price.
Compare iD Mobile SIM-only deals
iD Mobile offers a wide range of SIM-only plans with different data allowances, all including unlimited UK calls and texts.
You can choose between 30-day rolling plans or longer 12- and 24-month contracts. Prices typically start from around £6 per month for lower-data plans, with higher allowances available at higher monthly costs.
Our best iD Mobile SIM deals this week
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ID sim only
5G- 20GB of 5G data
- Unlimited minutes
- Unlimited texts
- download speed limit
- No annual price rise
- £6.00 per month
1 month contract From iD Mobile -
ID sim only
5G- 50GB of 5G data
- Unlimited minutes
- Unlimited texts
- download speed limit
- No annual price rise
- £8.00 per month
12 month contract From iD Mobile -
ID sim only
5G- 108GB of 5G data
- Unlimited minutes
- Unlimited texts
- download speed limit
- No annual price rise
- £9.00 per month
1 month contract From iD Mobile
Why choose an iD Mobile SIM?
- Flexible plans: Choice of 30-day, 12-month and 24-month contracts
- Data rollover: Unused data can roll over to the next month
- Spending cap: Set a monthly cap to control out-of-plan costs
- Strong coverage: Uses Three’s network, covering most of the UK
- 5G included: Available at no extra cost on compatible devices and in supported areas
- EU roaming: Available in selected destinations, subject to fair usage limits
Is iD Mobile a good network?
iD Mobile is a good option if you want a balance of affordability and features.
Because it runs on Three’s network, it offers good coverage and competitive data performance in many areas. Its main appeal is its combination of low prices and features like data rollover and spending caps.
Read our full iD Mobile network review here.
What to look for in an iD Mobile SIM contract
When choosing an iD Mobile SIM, the key factors to consider are your data allowance, contract length and monthly budget.
All plans include unlimited UK calls and texts, so your main decision is how much data you need. If you want flexibility, a 30-day plan may suit you, while longer contracts can offer better value.
iD Mobile’s best unlimited data SIMs
iD Mobile offers unlimited data plans across different contract lengths, making them suitable for heavy users who stream, browse or use their phone as a hotspot.
These plans include unlimited UK calls and texts, along with 5G access where available. As with all networks, usage is subject to fair use policies.
iD Mobile’s best rolling contract SIMs (30-day / 1-month)
iD Mobile offers 30-day rolling SIM-only plans, giving you the flexibility to change or cancel your plan each month.
These plans include unlimited UK calls and texts and a range of data allowances, along with features like data rollover.
iD Mobile’s best 12-month SIM deals
iD Mobile’s 12-month SIM-only plans offer a balance between flexibility and lower monthly pricing.
They include unlimited UK calls and texts, a choice of data allowances and access to features like data rollover and spending caps.
iD Mobile’s cheapest SIM-only deals
iD Mobile’s cheapest SIM-only deals are aimed at light users who mainly need calls, texts and a small amount of data.
Prices typically start from around £6 per month for entry-level plans, though this can vary depending on offers. All plans include unlimited UK calls and texts.
Should I get unlimited calls and texts?
All iD Mobile SIM-only plans include unlimited UK calls and texts as standard, so you don’t need to factor this into your decision.
Alternatives to iD Mobile
If you’re comparing networks, alternatives like SMARTY, VOXI, giffgaff and iD Mobile’s parent network Three also offer low-cost SIM-only deals.
Each network offers different features, pricing and perks, so it’s worth comparing options.
Can I use my iD Mobile SIM abroad?
Yes, iD Mobile allows you to use your allowance in selected destinations, subject to fair usage limits. Roaming policies can vary depending on your plan and destination, so it’s important to check before travelling.
Can I get 5G-enabled iD Mobile SIMs?
Yes, iD Mobile SIMs are 5G-ready. You’ll need a compatible device and to be in an area with 5G coverage to access it.
Can I keep my mobile number if I switch to an iD Mobile SIM-only deal?
Yes, you can keep your number by requesting a PAC (porting authorisation code) from your current provider and giving it to iD Mobile.
Are iD Mobile SIM-only deals cheaper than contracts?
SIM-only deals are often cheaper overall because you’re not paying for a handset. Choosing a SIM-only plan can be more cost-effective if you already have a phone.
