Network vs network
iD Mobile vs Three
Same masts, different deals. We compare price rises in pounds, roaming, credit checks and today’s cheapest SIMs on both.
bemobiles tips
Do they use the same masts?
Yes — coverage is effectively the same, so choose on price and extras.
Which one raises prices?
iD Mobile: None on SIM only; phone plans +£1.80. Three: +£1.80 to £2.30 every April by data.
Which is better abroad?
iD Mobile: 50 countries included, 30GB. Three: Go Roam £2.75 a day unless included.
iD Mobile£144
Three£285.60Cheapest SIM with 10GB or more × 24, plus April rises
Live prices; rises estimated for a plan starting this month.
Over 24 months, the cheapest 10GB+ SIM costs £144 on iD Mobile and £285.60 on Three once April rises are added — iD Mobile is £141.60 cheaper. Both run on the same masts.
Prices checked 28 October 2026 · facts checked monthly · How we compare
iD Mobile vs Three, side by side
| iD Mobile | Three | |
|---|---|---|
| Masts | Three | Own masts |
| Annual price rise | None on SIM only; phone plans +£1.80 | +£1.80 to £2.30 every April by data |
| Roaming | 50 countries included, 30GB | Go Roam £2.75 a day unless included |
| Credit check | Hard check | Hard check |
| eSIM | Yes | Yes |
| Wi-Fi Calling | Yes | Yes |
| Ofcom complaints per 100k (Q1 2026) | 3 | 2 |
| Cheapest SIM, 10GB+ | £6 a month | £7 a month |
| Cheapest SIM, 30GB+ | £7 a month | £8 a month |
| Cheapest SIM, Unlimited | £14 a month | £12.42 a month |
Highlighted = better on that line. Facts from network terms and Ofcom; prices live.
Our verdict
On price, iD Mobile comes out ahead for a typical 10GB+ SIM: £141.60 less over two years once April rises are counted (iD Mobile rises add about £0, Three’s about £45.60).
Because both use the same masts, coverage is identical — the choice comes down to price, price rises and extras.
Pick iD Mobile if…
- You want the lower 24-month cost for a 10GB+ SIM
- You want a price that doesn’t rise every year
iD Mobile and Three SIM only deals, live
FAQ
iD Mobile vs Three questions
Is iD Mobile or Three cheaper?
iD Mobile, today: the cheapest 10GB+ SIM costs £6 a month, and over 24 months with April rises the gap is £141.60.
Do iD Mobile and Three use the same network?
Yes, coverage is the same.
Which has better roaming?
iD Mobile: 50 countries included, 30GB. Three: Go Roam £2.75 a day unless included.
Can I switch from iD Mobile to Three and keep my number?
Yes. Text PAC to 65075 from your iD Mobile phone, give the code to Three, and the number moves within one working day.