The quick answer
Choose iD Mobile if you want the most data for your money and you travel: 80GB for £10 a month on a rolling plan, plus roaming in 50 destinations. Choose VOXI if most of your data goes on social media, music and video, because those apps don't count towards your allowance. Prices checked on each network's website on 5–6 November 2026.
Side by side
| VOXI | iD Mobile | |
|---|---|---|
| Network | Vodafone and Three combined | Vodafone and Three combined |
| £10 a month | 20GB + unlimited social | 80GB (1-month plan) |
| £12 a month | 25GB + unlimited social, music and video (75GB until 26 Nov) | 120GB (1-month plan) |
| Unlimited data | £35 a month | £18 a month rolling, or £17 on 24 months |
| Contract | 30-day rolling only | 1, 12 or 24 months |
| Price rises | Price locked on your plan | No annual price rises on SIM-only |
| Roaming | Buy a European Roaming Pass | Included in 50 destinations, up to 30GB |
| Extras | Unlimited social, music and video; VOXI Drop rewards | Free Data Rollover; Bill Cap |
| 5G and eSIM | Yes | Yes |
Data: who gives you more?
For general data, iD's £10 plan includes 80GB. VOXI's £10 plan includes 20GB plus unlimited social media, so the best choice depends on how you use your phone. If you spend hours a day on Instagram, YouTube, Spotify or Netflix, that use is free on VOXI, so 20GB to 35GB of general data can go a long way. If you mostly browse, use maps and work on the go, iD gives you more for less.
Travel
iD includes roaming in 50 destinations, including Spain and most of Europe, with up to 30GB. VOXI needs a separate European Roaming Pass, and while abroad the unlimited apps use your normal data. If you holiday in Europe, iD is the easier choice. For destinations neither covers, use a travel eSIM.
Flexibility
Both offer rolling monthly plans you can leave any month. iD also has 12 and 24-month plans with more data or intro offers, such as half price for the first months during its Black Friday sale.
