Mozillion
150GB data
£132paid onceCovers 24 months · equivalent to £5.50/monthNothing more to pay for the plan during the 24 months
No mid-contract price rises (Mozillion)
View offerOpens Mozillion’s site in a new tab.
High-data and unlimited SIM only plans
A plan with 100GB or more suits heavy streaming, hotspot use for a laptop, or a phone that stands in for home broadband. Most people use far less, so check a recent bill before paying for data you will not use.
12 current offers from Mozillion, Ecotalk, O2, 1pMobile, Chattr, as each seller states them, in order of monthly price.
Unlimited has limits
Unlimited plans usually have a fair-use policy, and some limit tethering or speed. The plan’s terms state what applies.
Check your real use
Your phone’s settings and your last bill show how much data you use in a month. Many people pay for far more than they need.
Current offers
Mozillion
150GB data
£90paid onceCovers 12 months · equivalent to £7.50/monthNothing more to pay for the plan during the 12 months
No mid-contract price rises (Mozillion)
View offerOpens Mozillion’s site in a new tab.
Mozillion
100GB data
£3.25a month£81.25 upfront
No mid-contract price rises, as stated by Mozillion.
View offerOpens Mozillion’s site in a new tab.
Ecotalk
100GB data
£12a monthNo upfront cost
No price rises, as stated by Ecotalk.
View offerOpens Ecotalk’s site in a new tab.
O2
120GB data
£12a month
View offerOpens O2’s site in a new tab.
O2
120GB data
£12a monthNo upfront cost
- Virgin Media customers may be eligible for double data 120GB becomes 240GB for an eligible Virgin Media customer
Eligibility and terms
- Virgin Media customers may be eligible for double data. As stated by O2, 30 September 2026. O2 confirms eligibility; not every customer qualifies.
Opens O2’s site in a new tab.
Mozillion
100GB data
£13.95a month
View offerOpens Mozillion’s site in a new tab.
Mozillion
100GB data
£14.95a month
View offerOpens Mozillion’s site in a new tab.
O2
250GB data
£15a month
View offerOpens O2’s site in a new tab.
1pMobile
100GB data
£15a month
View offerOpens 1pMobile’s site in a new tab.
Chattr
Unlimited data
£15a month
View offerOpens Chattr’s site in a new tab.
O2
250GB data
£15a monthNo upfront cost
View offerOpens O2’s site in a new tab.
What to check before you choose
- Your actual monthly use
- Fair-use and tethering limits
- 5G where you live and work
- The contract length and any stated rise
Common questions
- Is unlimited data really unlimited?
- Usually within a fair-use policy, and sometimes with limits on tethering. The plan’s terms say what applies.
- How much data do I need?
- Look at your last few bills or your phone’s settings. Most people use well under 100GB a month.