Best Big Data SIM Only Deals UK 2026 — No Contract, No Price Rises
Tired of eye-watering data prices and mid-contract price hikes? Mozillion has just launched three new SIM only plans — all on 1-month rolling contracts, running on the UK’s best network, with genuinely huge data allowances and no surprise price rises.
1. 210GB SIM Only — £17/month
- ✅ 210GB data
- ✅ Unlimited calls & texts
- ✅ Inclusive EU roaming
- ✅ Uncapped 5G speeds on the UK’s best network
- ✅ 1-month rolling contract — no long-term commitment
2. 260GB SIM Only — £18/month
- ✅ 260GB data
- ✅ Unlimited calls & texts
- ✅ Inclusive EU roaming
- ✅ Uncapped 5G speeds on the UK’s best network
- ✅ 1-month rolling contract — no long-term commitment
3. 310GB SIM Only — £19/month
- ✅ 310GB data
- ✅ Unlimited calls & texts
- ✅ Inclusive EU roaming
- ✅ Uncapped 5G speeds on the UK’s best network
- ✅ 1-month rolling contract — no long-term commitment
Why Mozillion?
All three plans run on 1-month rolling contracts — no 12 or 24-month lock-in, and no mid-contract price rises to worry about. If your needs change, you can switch or cancel with just a month’s notice.
Prices and data allowances are correct at time of writing — check the links above for current availability.
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