iD Mobile has built a strong position among UK budget SIM-only brands, running its service over the Three network and offering competitive pricing across a range of data allowances and contract lengths. It's one of the more established budget names, making it a common comparison point for anyone shopping for value.
1. iD Mobile and the Three network
Since iD Mobile runs over Three's infrastructure, coverage should broadly match Three's own network. Check Three's coverage specifically for your area before switching.
2. iD Mobile's contract options
iD Mobile typically offers a range of terms, from a 30-day rolling plan up to 12-month and 24-month contracts, plus unlimited data plans for heavier users.
3. Matching data to your usage
Use our mobile data guide to estimate a sensible allowance before comparing iD Mobile's specific plans and prices — see our cheapest iD Mobile deals guide for more on finding the best value.
4. iD Mobile vs other budget brands
Compare iD Mobile against other budget-focused SIM-only brands running on different networks, including giffgaff on O2 and Asda Mobile on Vodafone, since coverage and pricing both vary by network and area.
5. Frequently asked questions
What network does iD Mobile use?
iD Mobile runs its SIM-only service over the Three network, giving it access to the same underlying coverage as Three's own customers.
Does iD Mobile offer handset contracts too?
Yes, alongside its SIM-only range — see our iD Mobile deals guide for handset options.
Is iD Mobile cheaper than Three's own SIM-only plans?
iD Mobile is generally positioned as a more budget-focused alternative, though it's worth comparing live pricing directly.
Can I switch to iD Mobile and keep my number?
Yes, using a PAC code from your current provider, free of charge on request.
6. Conclusion
iD Mobile offers a budget-friendly way to access Three's network coverage across a range of contract lengths. Compare its data allowances against your actual usage and against other budget brands before deciding.
