iD Mobile SIM-only deals
iD Mobile SIM-only deals
8 iD Mobile plans, cheapest first. Prices checked against iD Mobile's own site — these are the ongoing monthly costs, not introductory rates.
| Data | Contract | Monthly price | |
|---|---|---|---|
| 8GB | 30-day rolling | £6.00 | Get deal* |
| 4GB | 30-day rolling | £6.00 | Get deal* |
| 5GB | 12-month contract | £6.00 | Get deal* |
| 10GB | 12-month contract | £6.00 | Get deal* |
| 6GB | 24-month contract | £6.00 | Get deal* |
| 12GB | 24-month contract | £6.00 | Get deal* |
| 10GB | 30-day rolling | £7.00 | Get deal* |
| 20GB | 30-day rolling | £7.00 | Get deal* |
Cheapest iD Mobile plan is £6.00/mo. iD Mobile runs on Three's network — compare it against every other provider using the same masts.
The essentials
| Price rises | None Promises no annual price rises on SIM-only plans (30-day, 12- and 24-month). Applies to SIM-only, not handset contracts. |
|---|---|
| Data rollover | Yes Unused data rolls once into the next month on all pay-monthly plans (used first, expires after a month). |
| Full-speed data | Full speed Full access, no speed caps |
| 5G | ✓ 5G is included on all SIM-only plans at no additional cost. |
| eSIM | ✓ iD Mobile offers eSIM on its SIM-only plans. |
| Tube coverage | ✓ You get Tube coverage through Three’s network. TfL station WiFi has been superseded by 4G/5G mobile coverage in tunnels and stations, rolled out by all four networks and growing across the lines — just use your phone and it connects automatically. |
| Inclusive international calls | No International calls are charged per minute or via a paid add-on — not included in the plan. |
| Unlimited data | Unlimited Genuinely unlimited data — no monthly fair-use cap (speed may be deprioritised at busy times; see Full-speed data). |
| EU roaming | Included Inclusive roaming in 50 destinations comes as standard on all plans at no extra cost. |
| Roaming data | 30GB Standing fair-use cap is 30GB, but an open-ended promo (since Oct 2024) currently lets you use your full UK allowance in the EU. |
Technical details
| Roaming countries | ? |
|---|---|
| Tethering / hotspot | ? |
| 5G Standalone | ✗ Not available — Three's network doesn't support standalone 5G yet |
| WiFi calling | ✓ Wi-Fi Calling is listed as one of iD Mobile's standard plan features. |
| Roaming beyond the EU | Charged per use; rates dep… |
| 4G calling (VoLTE) | ✓ |
| RCS messaging | ✗ |
| RCS encryption | ✗ |
| Conference calling | ✓ |
| Missed call alerts | Some Only available when roaming off the host network |
| Visual voicemail | ✗ |
| HD Voice | ✓ |
| Carrier IMS | ✓ |
| Carrier voicemail | ✓ |
| Inclusive MMS | ✗ |
| IPv6 | Some IPv4 only |
| Roaming agreements | ✓ DIRECT |
| 5G roaming | ✓ |
| 4G calling abroad | ✓ |
iD Mobile FAQ
How much is iD Mobile?
The cheapest iD Mobile SIM-only plan is £6.00/mo (8GB, 30-day rolling). iD Mobile sells 8 plans in total, and we check every price against iD Mobile's own site.
What network does iD Mobile use?
iD Mobile is an MVNO: it runs on Three's masts, so you get the same signal and coverage as Three, usually at a lower price.
Can I use iD Mobile abroad in the EU?
iD Mobile includes EU roaming. Inclusive roaming in 50 destinations comes as standard on all plans at no extra cost.
Does iD Mobile have 5G?
Yes — iD Mobile includes 5G. 5G is included on all SIM-only plans at no additional cost.
Does iD Mobile support eSIM?
Yes — iD Mobile supports eSIM. iD Mobile offers eSIM on its SIM-only plans.
Does iD Mobile put prices up mid-contract?
Yes — iD Mobile raises prices during your contract. Promises no annual price rises on SIM-only plans (30-day, 12- and 24-month). Applies to SIM-only, not handset contracts.
Other SIMs on the Three network
Same masts, same coverage — different prices and features.
Feature and price data is checked by Scrimpr against iD Mobile's own site and public documentation. Networks change plans often — always confirm details on the provider's site before buying. Some links are affiliate links (marked *), which support Scrimpr at no cost to you.
