Our 100GB SIM is £13. Or free every month.
Kill Your Bill
Shop with 200+ leading brands for the spending you already do.
Every month get instant rewards that shrink or even kill your phone bill.
And the winner is: you.
Your calls, data, streaming and gaming sizzle across the UK’s 2025 Best Network winner
Firing up your phone
Buckle up. Unlike most, Mozillion features uncapped 5G speeds up to 10 x faster than 4G.
Kill Your Bill every month
Shop away your phone bill, get an instant reward that will shrink or even wipe out your bill.
SIM only plans
Every Mozillion plan includes:
• On the UK’s Best Network • Fastest uncapped 5G speeds
• Free EU roaming in 41 countries • No
contract or credit check • No mid-contract price rises
Unlimited data
1-Month
Unlimited calls &
txts
EU roaming
£21.00 p/m
Unlimited data
12-Months
Unlimited calls &
txts
EU roaming
£20.50 p/m
Unlimited data
24-Months
Unlimited calls &
txts
EU roaming
£20.00 p/m
100GB data
1-Month
Unlimited calls &
txts
EU roaming
£12.00 p/m
100GB data
12-Months
Unlimited calls &
txts
EU roaming
£11.50 p/m
100GB data
24-Months
Unlimited calls &
txts
EU roaming
£11.00 p/m
80GB data
1-Month
Unlimited calls &
txts
EU roaming
£11.00 p/m
80GB data
12-Months
Unlimited calls &
txts
EU roaming
£10.50 p/m
80GB data
24-Months
Unlimited calls &
txts
EU roaming
£10.00 p/m
30GB data
1-Month
Unlimited calls &
txts
EU roaming
£9.00 p/m
30GB data
12-Months
Unlimited calls &
txts
EU roaming
£8.50 p/m
30GB data
24-Months
Unlimited calls &
txts
EU roaming
£8.00 p/m
10GB data
1-Month
Unlimited calls &
txts
EU roaming
£7.00 p/m
10GB data
12-Months
Unlimited calls &
txts
EU roaming
£6.50 p/m
10GB data
24-Months
Unlimited calls &
txts
EU roaming
£6.00 p/m
3GB data
1-Month
Unlimited calls &
txts
EU roaming
£5.00 p/m
3GB data
12-Months
Unlimited calls &
txts
EU roaming
£4.50 p/m
3GB data
24-Months
Unlimited calls &
txts
EU roaming
£4.00 p/m
1GB data
1-Month
Unlimited calls &
txts
EU roaming
£4.00 p/m
1GB data
12-Months
Unlimited calls &
txts
EU roaming
£3.50 p/m
1GB data
24-Months
Unlimited calls &
txts
EU roaming
£3.00 p/m
Unlimited data
24-Months
Unlimited calls &
txts
EU roaming
£20.00 p/m
100GB data
24-Months
Unlimited calls &
txts
EU roaming
£11.00 p/m
80GB data
24-Months
Unlimited calls &
txts
EU roaming
£10.00 p/m
30GB data
24-Months
Unlimited calls &
txts
EU roaming
£8.00 p/m
10GB data
24-Months
Unlimited calls &
txts
EU roaming
£6.00 p/m
3GB data
24-Months
Unlimited calls &
txts
EU roaming
£4.00 p/m
1GB data
24-Months
Unlimited calls &
txts
EU roaming
£3.00 p/m
Unlimited data
12-Months
Unlimited calls &
txts
EU roaming
£20.50 p/m
100GB data
12-Months
Unlimited calls &
txts
EU roaming
£11.50 p/m
80GB data
12-Months
Unlimited calls &
txts
EU roaming
£10.50 p/m
30GB data
12-Months
Unlimited calls &
txts
EU roaming
£8.50 p/m
10GB data
12-Months
Unlimited calls &
txts
EU roaming
£6.50 p/m
3GB data
12-Months
Unlimited calls &
txts
EU roaming
£4.50 p/m
1GB data
12-Months
Unlimited calls &
txts
EU roaming
£3.50 p/m
Unlimited data
1-Month
Unlimited calls &
txts
EU roaming
£21.00 p/m
100GB data
1-Month
Unlimited calls &
txts
EU roaming
£12.00 p/m
80GB data
1-Month
Unlimited calls &
txts
EU roaming
£11.00 p/m
30GB data
1-Month
Unlimited calls &
txts
EU roaming
£9.00 p/m
10GB data
1-Month
Unlimited calls &
txts
EU roaming
£7.00 p/m
3GB data
1-Month
Unlimited calls &
txts
EU roaming
£5.00 p/m
1GB data
1-Month
Unlimited calls &
txts
EU roaming
£4.00 p/m
Our Benefits
No credit check
Wi-Fi calling
Keep your number
Fixed price contracts
Hotspot enabled
EU roaming
Pros without the cons. How Mozillion compares.
We compare some of the top SIM-only deals available right now so you can make an informed choice!
SIM-only: simple, flexible, affordable
A SIM-only plan focuses on your calls, texts and data. You carry on using your existing phone, so your costs are far lower – there’s no new phone in the deal.
Mozillion data plans also save you money every month, so you win again. And with SIM-only you get real choice: from short 30-day rolling plans, to the massive savings that come with 24-month deals.
Whichever Mozillion plan you choose, we even throw in free EU roaming.
Signing and switching
Going SIM-only couldn’t be simpler. Just choose the plan above that suits you best.
If you also want to bring your number, text ‘PAC’ to 65075. Your current network will send you an automated code (usually in minutes). Have that ready to enter when you sign up with us. The one-off “porting” process can take between one and three working days to complete.
Once we have your order, we send you a new SIM card by first class post. Or, if your phone supports it, you can download a digital eSIM, just select which SIM type you'd like at the checkout.
There is no credit check needed for SIM-only deals.
Frequently Asked Questions
‘SIM-only’ means you can buy a new calls/data plan from any provider, without a phone being part of the deal. So if you’re happy with your iPhone or Android – but want a network that works better and costs less – Mozillion SIM-only could be the perfect solution.
Also, SIM-only means freedom. You can explore all the providers, and with Mozillion you can sign up for as little as one month and ‘test drive’ our network.
A couple of things.
First, check out any contract you may already have. It might pay you to sit tight until it finishes, and then move.
Or: you may find Mozillion’s savings, and our raft of other benefits, makes it worth paying to make the switch early.
And second, check that your phone is ‘unlocked’, meaning that it can work on any network. See the next question…
All mobiles work with Mozillion, but they need to be unlocked.
If you bought your phone new after December 2021, it should be unlocked anyway, but if not, you can ask your current network to help you unlock it.
Definitely. Apart from obvious factors such as price and reliability, many networks cap your speeds. The cheaper you go, the slower your data.
With Mozillion, we never cap our customers. Everyone gets full-throttle speeds, regardless of the plan they choose.
Our plans run on the same infrastructure as the UK’s best phone network — independently ranked #1 for overall performance.
That means as a Mozillion customer, you benefit from:
- The Nation’s #1 Network
- The UK’s Most Reliable Network
- The UK’s Fastest Network
- The UK’s Best 5G Experience
- The UK’s Best Network for Video
- The UK’s Most Reliable Network for Mobile Gaming
- The UK’s Best Network for Calls
- The UK’s Best Network for Data Performance
These rankings are based on independent nationwide testing by RootMetrics.
Read the full findings here: RootMetrics Report
Take a personalised look at all the places where you live, work and hang out, here: Coverage Checker
Mozillion’s network covers an unrivalled 99% of the UK population. And all Mozillion plans give you 4G and 5G coverage where it’s available, using a compatible device.
Unlike many, Mozillion lets you use your plan in the EU pretty much like you do here. All your calls and texts in 41 European countries are still unlimited and free, up to the allowance of your plan. Also, you can also use a generous chunk of your data allowance free:
- - 1GB plans: up to 50% of your data allowance
- - 3GB-30GB plans: up to 25%
- - 100GB, 80GB, 500GB and unlimited plans: 25GB
The easiest way is to text ‘PAC’ to your current provider on 65075, with your existing SIM card in your phone.
They’ll text you back – usually instantly – with a PAC code to pass on to Mozillion. When you order your new Mozillion SIM, simply tell us the PAC and our system will action your transfer.
You can choose:
- - A physical Mozillion SIM to slot into your phone. It will fit any phone that uses standard, micro or nano cards.
- - Or, in newer smartphones, you can activate a digital eSIM.
Please note, there can be a short, one-time gap in service when you switch from one network to another.
Yes, these are classed as out of bundle charges, you can top up your Mozillion Wallet with credit to be able to make international calls from the UK or from other countries not included in your plan's EU roaming allowance. Rates apply
Yes, top up your Mozillion Wallet with credit and you can use calls, texts and data in hundreds of destinations around the world, including the USA, UAE, India, Canada, Mexico, Australia, New Zealand and many more. Rates apply
MMS isn't included in your Mozillion allowance of unlimited calls and texts but you can top up your Mozillion Wallet with credit to send MMS. Rates apply
All you need is a Kill Your Bill Sim-Only plan (see above). Then just shop like you do every week with our partners, and get an instant cash reward applied to your Mozillion bill every time.
When you're about to pay, open the app, find your chosen brand, and follow the instructions. Your reward is instantly credited to your monthly phone bill.
No — Kill Your Bill is for online as well as personal shoppers.
It has a QR code on it, which you scan (in store) or enter at the checkout (if shopping online). As soon as you buy any gift cards you receive your cash reward direct to your phone bill, so feel free to buy them in advance.
Absolutely. Through the Mozillion app, you can buy and send store gift cards as presents — and receive even more rewards instantly to shrink or Kill Your Bill.
Your monthly bill is absolutely free, and we roll over any credit balance to your next bill. So you never lose out on rewards you've earned.
The app states the reward on the amount you are spending. Your dashboard gives you a running total of how you're shrinking — or even killing — your bill.
Just contact the brand or service directly in the usual way. Note: refunds are not available on the gift card purchase.
If it's a pay monthly SIM-only plan you can upgrade to one of the Kill Your Bill plans. Even mid-contract. Upgrade your plan in your dashboard .
Yes, you can choose at any stage whether you would like to use it or not, this is simply an added feature to our SIM only plans.
Simple, subscribe to any of our 1-month rolling plans and give it a go. You can then change your plan at any time.
This is available on the app after you have purchased a SIM only plan.
Here is a link to preview…
Within Mozillion’s Kill Your Bill, an eGift Card is a digital voucher purchased through the Mozillion app. It is used at checkout (online or in-store) by scanning a QR code or entering a code and PIN.
When you purchase an eGift Card through the app, you receive an instant reward that is applied towards your Mozillion bill.
