Can I switch my network and take out a SIM only deal?

You can change network provider and slash your phone bills with Mozillion provided you are out of contract with your existing supplier. If you want to keep your old number, then this can be ported over to our network that runs on EE at the checkout or any time after taking on of our SIM only deals.

What is the best UK network for SIM only deals?

EE has been named as the best network for 10 years in a row, by an independent test conducted by Rootmetrics, which shows that EE is the best overall mobile network for customers across the UK. EE was proven to be the best for reliability, accessibility, speed, data, calls and texts. EE’s UK-wide median download speed 65.1Mbps was found to be nearly twice as fast as any other mobile operator, 400% faster than 02/Virgin Media at 15.5Mbps, Three 34.7Mbps, and Vodafone 29.4%. This information was published by Rootmetrics, UK RootScore Report 1H 2023. If you want to sign up to an EE SIM only deal, then consider Mozillion as the SIM plans offered are better value and use EE’s network along with uncapped 5G speeds – up to 10x faster than 4G speeds.

What networks do the other suppliers operate on?

The more budget friendly MVNOs (Mobile Virtual Network Operators) use the Three network such as Smarty, owned by Three, ID Mobile, owned by Curry’s and Honest Mobile, privately owned. VOXI, Talkmobile, owned by Vodafone, use Vodafone along with Lebara and Asda Mobile. Tesco Mobiles, Sky Mobiles use O2, along with Giff Gaff, which is owned by 02. MVNOs that use the EE network are Mozillion, privately owned, and Spusu an Austrian company operating in the UK. EE is the only network that does not have a budget sub brand, unlike Three, Vodafone or 02, so the best way to slash your phone bills with an EE SIM only deal is with Mozillion.

Should I choose a SIM only deal?

Yes if you want to slash your phone bills, SIM only deals offer great savings over traditional phone contract deals. SIM only costs a fraction of the price of the airtime when bundled with a new phone on contract. You get far more data, calls and texts for a smaller monthly fee. In addition to the cost saving Vs phone contract deals, SIM only plans offer very short term contracts so you are not tied in, these start from a 30-day rolling plan, 12 and 24-months terms. The longer you sign up for the greater the saving becomes. A Mozillion Unlimited SIM only deal could save you hundreds of pounds over 12-months compared to other network's plans. If you don't need to replace your phone, then a SIM only plan is the best way to make instant savings, these are perfect for families, businesses and individuals.

What are the disadvantages of a SIM only deal?

There is no real disadvantage as the savings are so great, unless you need a new phone, as SIM only plans do not include one.

What is the best SIM only deal?

The best SIM only deal is one that suits your needs and budget, simply look at you last few bills to find out how much data you use, then find a SIM plan with slightly more data. Consider what you are happy to pay each month, some SIM plans are very cheap but the speeds are throttled right back, so in effect you may have a new 5G phone with a 5G SIM plan – but the browsing speeds are worse than 3G. Find a SIM plan from a company that uses a quality network with uncapped speeds. The 4 large networks charge more money for more speed on the same plan – they may have 5 variations of an Unlimited SIM only plan, the cheapest may have speeds capped at 10Mbps only – 5G speeds can hit 650Mbps. All Mozillion SIM plans have uncapped speeds on the EE network. Data allowance is another consideration, you need enough to browse the web, for social media, streaming and gaming. To get the right amount of data, so you are not paying for more than you need, simply check your usage from you last phone bills or directly with your network provider. Some phones can also give you data usage in the settings menu. SIM only plans have 3 different terms, 1-month, 12-month, and 24-months, the longer period you agree to the greater the saving. Once the term is up you're free to move plans or swap network providers. 1-month rolling plans offer the greatest flexibility, as you can stay for as long as you like or keep switching networks after a 30-day period.

How simple is it to change networks?

Very simple if you are out of contract with your existing network provider, contact them to find out if you are out of contract or when it will end. If you wish to change network earlier than the end of your contact, the network may charge you an early termination fee to exit the contract. If you take a SIM only deal with a new number it will work as soon as you put it in your phone, if you are porting your number then this could take up to 1-3 working days from your order date. An eSIM will work instantly once downloaded.

When does the SIM only contract begin?

All SIM only contracts start from the date of despatch, normally a working day, Monday to Friday. An eSIM is sent by email, so almost instant, and plastic SIM cards are sent by 1st Class Royal Mail.

Do I lose network service when I change provider?

Switching to another network may cause a temporary loss of service whilst your number ports across to the new provider. However, once this has completed you can access the new network without any further loss of service. If you are not keeping your number, turn the phone off before switching SIM cards, turn back on once back in the phone, and browsing, calls and texting should be instant thereafter.

Do you need to have an unlocked phone to use with the SIM only plans?

If your phone is locked to a specific network, you will need to have it unlocked to use a SIM only deal on another network provider. Phones purchased using a traditional phone contract deal, are locked at point of sale, so they will only work with a SIM card from that provider. If your phone is network locked you need to contact your current provider for an unlocking code. Unlocking your phone is very straightforward, many providers offer this service at no cost or for a small admin charge, after meeting certain conditions, such as being out of contract or using the phone on contract for a minimum term of 6-months. To check the status of your iPhone: Settings – General – About – scroll to Network Provider Lock. No SIM restrictions displayed means it is unlocked. To check an Android phone: Settings – Connections – Network and Internet - Mobile network – Choose network. If only one network is showing the phone is locked, if several are displayed it is unlocked.

What is the best SIM only deals from a network provider?

Some of the best EE SIM only deals are offered by Mozillion, companies like Mozillion offer airtime with their own brand but using the EE network. Mozillion has a customer service helpline number, unlike other budget SIM only providers, who only provide online support, unless you go direct to the major network.

How do I get my PAC code?

This is very simple, the easiest method is to text the word PAC to 65075, and a code will be sent straight to your phone. Alternatively contact your network provider. Once you have your PAC code you can port your number to any new SIM only deal.

Can I get a 5G SIM only plan?

Yes, Mozillion offers SIM plans with a 5G enabled SIM card, so if you have a 5G phone it will automatically pick up the strongest signal available between 4G and 5G so you will always have a signal. If choosing from another supplier check that the SIM only plan includes a 5G enabled SIM card, you will also need a 5G device.

What is a Data-only SIM plan?

A data-only plan includes a data allowance but no call minutes or texts. They can be used with SIM/eSIM enabled devices such as tablets, laptops, mobile broadband dongles or mobile broadband routers.

What happens if I exceed my monthly data allowance?

If you run out of data mid-month, you won’t be charged for any further usage but also won’t be able to use any services that require data. You can purchase additional 1GB, 3GB or 10GB data add-ons by contacting us via email help@mozillion.com. You are also able to change price plans for your next billing period if you decide you will need more data each month.

What is Mozillion coverage like in my area?

Mozillion uses EE’s 4G and 5G network. You can check coverage in your area with our Coverage Checker .

Yes. All Mozillion plans include roaming use for data, calls and texts in 41 selected EU destinations. You can use up to 50% of your monthly data allowance on 1GB plans, 25GB on unlimited plans and up to 25% of your monthly data allowance on all other plans.

Which countries can I use my roaming allowance in?

Spain, France, Portugal, Ireland, Greece, Poland, Italy, Germany, Netherlands, Bulgaria, Cyprus, Switzerland. Belgium, Sweden, Croatia, Hungary, Malta, Lithuania, Romania, Finland, Czech Republic, Norway, Slovakia, Austria, Denmark, Gibraltar, Iceland, Latvia, Estonia, Luxembourg, Guadeloupe, Slovenia, Liechtenstein, French Guiana, Guernsey, Isle of Man, Jersey, Martinique, Réunion, San Marino, Faroe Islands.

Can I have a new mobile number?

Yes. Your SIM will come with a new mobile number. If you decide not to transfer your existing number over, you can use this new mobile number instead.

Will the SIM card fit my device?

Our SIM cards fit all devices that use a standard, micro or nano SIM card. Whether you need a standard SIM, Micro SIM or Nano SIM – you simply pop out the right size from for your device. eSIM is also available.

How do I pay for my SIM?

Your SIM only plan is a simple subscription. Depending on the plan you choose, you’ll either pay all upfront or pay each month for the duration of your plan.

Can I tether with my SIM?

Yes, you can tether another phone, laptop or tablet to your phone.

What happens at the end of my plan duration?

If you’re on a pay monthly plan, at the end of your plan duration, your plan will continue on a monthly rolling plan until you either request to cancel it or move to a new plan. If you are on a 12 or 24 month plan, we will contact you towards the end of your contract to advise you of this. If you are on a Pay as you go Prepaid/Preloaded plan, your plan automatically ends at the end of the plan period. You can contact us to change plans.

Can I keep my current mobile number?

Yes. If you have an existing mobile number you can transfer it over when you order your SIM card, simply enter the details at checkout and we’ll handle the rest. You will need a PAC from your current network provider which you can get by texting the word PAC to 65075. You can also choose to do this later after you order.

What happens if I exceed my monthly data allowance?

If you run out of data mid-month, you won’t be charged for any further usage but also won’t be able to use any services that require data. You can purchase additional 1GB, 3GB or 10GB data add-ons by contacting us via email help@mozillion.com. You are also able to change price plans for your next billing period if you decide you will need more data each month.

What is Mozillion coverage like in my area?

Mozillion uses EE’s 4G and 5G network. You can check coverage in your area with our Coverage Checker.

Yes. All Mozillion plans include roaming use for data, calls and texts in 41 selected EU destinations. You can use up to 50% of your monthly data allowance on 1GB plans, 25GB on unlimited plans and up to 25% of your monthly data allowance on all other plans.

Which countries can I use my roaming allowance in?

Spain, France, Portugal, Ireland, Greece, Poland, Italy, Germany, Netherlands, Bulgaria, Cyprus, Switzerland. Belgium, Sweden, Croatia, Hungary, Malta, Lithuania, Romania, Finland, Czech Republic, Norway, Slovakia, Austria, Denmark, Gibraltar, Iceland, Latvia, Estonia, Luxembourg, Guadeloupe, Slovenia, Liechtenstein, French Guiana, Guernsey, Isle of Man, Jersey, Martinique, Réunion, San Marino, Faroe Islands.

Can I have a new mobile number?

Yes. Your SIM will come with a new mobile number. If you decide not to transfer your existing number over, you can use this new mobile number instead.

Will the SIM card fit my device?

Our SIM cards fit all devices that use a standard, micro or nano SIM card. Whether you need a standard SIM, Micro SIM or Nano SIM – you simply pop out the right size from for your device. eSIM is also available.

How do I pay for my SIM?

Your SIM only plan is a simple subscription. Depending on the plan you choose, you’ll either pay all upfront or pay each month for the duration of your plan.

Can I tether with my SIM?

Yes, you can tether another phone, laptop or tablet to your phone.

What happens at the end of my plan duration?

If you’re on a pay monthly plan, at the end of your plan duration, your plan will continue on a monthly rolling plan until you either request to cancel it or move to a new plan. If you are on a 12 or 24 month plan, we will contact you towards the end of your contract to advise you of this. If you are on a Pay as you go Prepaid/Preloaded plan, your plan automatically ends at the end of the plan period. You can contact us to change plans.

Can I keep my current mobile number?

Yes. If you have an existing mobile number you can transfer it over when you order your SIM card, simply enter the details at checkout and we’ll handle the rest. You will need a PAC from your current network provider which you can get by texting the word PAC to 65075. You can also choose to do this later after you order.

What happens if I exceed my monthly data allowance?

If you run out of data mid-month, you won’t be charged for any further usage but also won’t be able to use any services that require data. You can purchase additional 1GB, 3GB or 10GB data add-ons by contacting us via email help@mozillion.com. You are also able to change price plans for your next billing period if you decide you will need more data each month.

What is Mozillion coverage like in my area?

Mozillion uses EE’s 4G and 5G network. You can check coverage in your area with our Coverage Checker.

Yes. All Mozillion plans include roaming use for data, calls and texts in 41 selected EU destinations. You can use up to 50% of your monthly data allowance on 1GB plans, 25GB on unlimited plans and up to 25% of your monthly data allowance on all other plans.

Which countries can I use my roaming allowance in?

Spain, France, Portugal, Ireland, Greece, Poland, Italy, Germany, Netherlands, Bulgaria, Cyprus, Switzerland. Belgium, Sweden, Croatia, Hungary, Malta, Lithuania, Romania, Finland, Czech Republic, Norway, Slovakia, Austria, Denmark, Gibraltar, Iceland, Latvia, Estonia, Luxembourg, Guadeloupe, Slovenia, Liechtenstein, French Guiana, Guernsey, Isle of Man, Jersey, Martinique, Réunion, San Marino, Faroe Islands.

Can I have a new mobile number?

Yes. Your SIM will come with a new mobile number. If you decide not to transfer your existing number over, you can use this new mobile number instead.

Will the SIM card fit my device?

Our SIM cards fit all devices that use a standard, micro or nano SIM card. Whether you need a standard SIM, Micro SIM or Nano SIM – you simply pop out the right size from for your device. eSIM is also available.

How do I pay for my SIM?

Your SIM only plan is a simple subscription. Depending on the plan you choose, you’ll either pay all upfront or pay each month for the duration of your plan.

Can I tether with my SIM?

Yes, you can tether another phone, laptop or tablet to your phone.

What happens at the end of my plan duration?

If you’re on a pay monthly plan, at the end of your plan duration, your plan will continue on a monthly rolling plan until you either request to cancel it or move to a new plan. If you are on a 12 or 24 month plan, we will contact you towards the end of your contract to advise you of this. If you are on a Pay as you go Prepaid/Preloaded plan, your plan automatically ends at the end of the plan period. You can contact us to change plans.

SIM Plan & Mobile phone deals. Buy/Sell New or Second-hand phones

Out of this world

Samsung Galaxy S25 Ultra 256GB plus Unlimited data for 24-months

Only £42/month on the UK’s best network

no mid-contract price rises.

See offer

Save big time on airtime

80GB of data, plus unlimited calls and texts, every month for 24-months.

Only £132 when you pay upfront

equivalent to £5.50 /month. Limited offer.

See offer

Brands we offer

Apple iPhone

The Apple iPhone is the most recognisable and popular brand on the market. Mozillion offers all the latest new and refurbished iPhones to buy, including the latest iPhone 16 Pro Max, iPhone 16 Pro, iPhone 16 Plus, iPhone 16 and the iPhone 16e. Choose from a brand-new phone, a good as new one, or a refurbished phone - you can find one that's perfect for your needs and budget.

Samsung Phones

A market-leading innovator, Samsung offers cutting-edge technology at more affordable prices. Optimised to run Android instead of iOS, its versatile phones are consistently among the best performing out there. Samsung’s head-turning designs include the Samsung Galaxy S25 Ultra, the Galaxy S25 Plus or the Galaxy S25

Google Phones

Google’s Android operating system gives it a massive footprint in the smartphone industry, but its phones are brilliant too. Catering to the upper mid-range, Google’s new and refurbished phones combine quality and function with regular OS and security updates. Highlights include the Google Pixel 9 Pro and the new Pixel 9.

SIM type

Apple Phones

Samsung Phones

Google Phones

Out of this world

Samsung Galaxy S25 Ultra 256GB plus Unlimited data for 24-months

Save big time on airtime

80GB of data, plus unlimited calls and texts, every month for 24-months.

SIM only plans

UK’s best network • 4G & 5G enabled • Uncapped speed

500GB data 12-Months Unlimited calls & txts

£299.00

500GB data 24-Months Unlimited calls & txts

£599.00

100GB data 12-Months Unlimited calls & txts

£129.00

100GB data 24-Months Unlimited calls & txts

£149.00

80GB data 12-Months Unlimited calls & txts

£122.00

80GB data 24-Months Unlimited calls & txts

£132.00

30GB data 12-Months Unlimited calls & txts

£109.00

30GB data 24-Months Unlimited calls & txts

£129.00

10GB data 12-Months Unlimited calls & txts

£99.00

10GB data 24-Months Unlimited calls & txts

£119.00

3GB data 12-Months Unlimited calls & txts

£75.00

3GB data 24-Months Unlimited calls & txts

£95.00

1GB data 12-Months Unlimited calls & txts

£70.00

1GB data 24-Months Unlimited calls & txts

£90.00

500GB data 24-Months Unlimited calls & txts

£599.00

100GB data 24-Months Unlimited calls & txts

£149.00

80GB data 24-Months Unlimited calls & txts

£132.00

30GB data 24-Months Unlimited calls & txts

£129.00

10GB data 24-Months Unlimited calls & txts

£119.00

3GB data 24-Months Unlimited calls & txts

£95.00

1GB data 24-Months Unlimited calls & txts

£90.00

500GB data 12-Months Unlimited calls & txts

£299.00

100GB data 12-Months Unlimited calls & txts

£129.00

80GB data 12-Months Unlimited calls & txts

£122.00

30GB data 12-Months Unlimited calls & txts

£109.00

10GB data 12-Months Unlimited calls & txts

£99.00

3GB data 12-Months Unlimited calls & txts

£75.00

1GB data 12-Months Unlimited calls & txts

£70.00

100GB data 1-Month

£16.00 p/m

30GB data 1-Month

£12.00 p/m

10GB data 1-Month

£10.00 p/m

3GB data 1-Month

£8.00 p/m

1GB data 1-Month

£7.00 p/m

100GB data 1-Month

£16.00 p/m

30GB data 1-Month

£12.00 p/m

500GB data
12-Months
Unlimited calls & txts

500GB data
24-Months
Unlimited calls & txts

100GB data
12-Months
Unlimited calls & txts

100GB data
24-Months
Unlimited calls & txts

80GB data
12-Months
Unlimited calls & txts

80GB data
24-Months
Unlimited calls & txts

30GB data
12-Months
Unlimited calls & txts

30GB data
24-Months
Unlimited calls & txts

10GB data
12-Months
Unlimited calls & txts

10GB data
24-Months
Unlimited calls & txts

3GB data
12-Months
Unlimited calls & txts

3GB data
24-Months
Unlimited calls & txts

1GB data
12-Months
Unlimited calls & txts

1GB data
24-Months
Unlimited calls & txts

500GB data
24-Months
Unlimited calls & txts

100GB data
24-Months
Unlimited calls & txts

80GB data
24-Months
Unlimited calls & txts

30GB data
24-Months
Unlimited calls & txts

10GB data
24-Months
Unlimited calls & txts

3GB data
24-Months
Unlimited calls & txts

1GB data
24-Months
Unlimited calls & txts

500GB data
12-Months
Unlimited calls & txts

100GB data
12-Months
Unlimited calls & txts

80GB data
12-Months
Unlimited calls & txts

30GB data
12-Months
Unlimited calls & txts

10GB data
12-Months
Unlimited calls & txts

3GB data
12-Months
Unlimited calls & txts

1GB data
12-Months
Unlimited calls & txts

100GB data
1-Month

30GB data
1-Month

10GB data
1-Month

3GB data
1-Month

1GB data
1-Month

100GB data
1-Month

30GB data
1-Month

10GB data
1-Month

3GB data
1-Month

1GB data
1-Month

Unlimited data
1-Month
Unlimited calls & txts

Unlimited data
12-Months
Unlimited calls & txts

Unlimited data
24-Months
Unlimited calls & txts

100GB data
1-Month
Unlimited calls & txts

100GB data
12-Months
Unlimited calls & txts

100GB data
24-Months
Unlimited calls & txts

80GB data
1-Month
Unlimited calls & txts

80GB data
12-Months
Unlimited calls & txts

80GB data
24-Months
Unlimited calls & txts

30GB data
1-Month
Unlimited calls & txts

30GB data
12-Months
Unlimited calls & txts

30GB data
24-Months
Unlimited calls & txts

10GB data
1-Month
Unlimited calls & txts

10GB data
12-Months
Unlimited calls & txts

10GB data
24-Months
Unlimited calls & txts

3GB data
1-Month
Unlimited calls & txts

3GB data
12-Months
Unlimited calls & txts

3GB data
24-Months
Unlimited calls & txts

1GB data
1-Month
Unlimited calls & txts

1GB data
12-Months
Unlimited calls & txts

1GB data
24-Months
Unlimited calls & txts

Unlimited data
24-Months
Unlimited calls & txts

100GB data
24-Months
Unlimited calls & txts

80GB data
24-Months
Unlimited calls & txts

30GB data
24-Months
Unlimited calls & txts

10GB data
24-Months
Unlimited calls & txts

3GB data
24-Months
Unlimited calls & txts

1GB data
24-Months
Unlimited calls & txts

Unlimited data
12-Months
Unlimited calls & txts

100GB data
12-Months
Unlimited calls & txts

80GB data
12-Months
Unlimited calls & txts