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SIM-only

Compare Mozillion SIM Only Deals

Compare the latest Mozillion SIM-only plans by data, price and contract length, and plant trees with every switch.

Check coverage before you switch

Coverage depends on the network this SIM runs on. Check the signal where you live before you switch.

About Mozillion

Mozillion is a UK marketplace with a refurbished-first focus, pairing pre-owned handsets with SIM deals to keep your costs down. It owns no masts of its own: the tariffs it lists ride on assorted networks, so the coverage you get tracks the plan you choose. SIM-only plans start from £3.00 a month. Compare the live Mozillion deals below.

Quick facts

  • A bargain-led marketplace, not a mobile network
  • Built around refurbished, pre-owned handsets
  • Tariffs sit on assorted networks, so coverage tracks the plan
  • A way to trim both handset and monthly costs
  • Take your number with you using a PAC code

How Mozillion works

Mozillion's whole pitch is value, with refurbished handsets at the centre and SIM tariffs sold alongside them. None of the signal is Mozillion's own. The plans it lists are carried by whichever network underpins them, so you buy through the marketplace while that network runs your calls, texts and data. The saving usually comes twice over: a cheaper phone up front and a keener monthly tariff to go with it.

What you can get

On Mozillion you will find SIM-only tariffs, frequently bundled with a refurbished handset for anyone who would rather not pay brand-new prices. With tariffs sourced from assorted networks, you get a range of allowances and price points to size up. The marketplace shifts often, so lean on the live deals above for an accurate read on what is going right now before you choose.

Plan types across networks

With tariffs coming off assorted networks, the line-up is mixed rather than uniform. You will spot rolling plans alongside longer commitments, and the allowances move about plan by plan. Pinning one coverage figure to Mozillion makes no sense, as each tariff stands on its own network. Sort by price and data to draw up a shortlist, then make sure that network gives you dependable signal where you actually use your phone.

Who Mozillion suits

This one is for the bargain hunter, above all anyone comfortable with a refurbished phone to shave the cost of an upgrade, with a matching SIM tariff alongside. If keeping the total spend down beats owning the newest model, Mozillion is worth a browse. The catch is the same as any marketplace: coverage belongs to the tariff's network, so test that signal at your postcode before you commit.

Pros

  • A way to trim handset and monthly costs together
  • Refurbished phones for cheaper upgrades
  • SIM tariffs drawn from assorted networks
  • A spread of allowances and prices to size up

Cons

  • No masts of its own, so coverage tracks the tariff you choose
  • The line-up varies by network, so read each tariff's terms

Our verdict

Mozillion makes sense for the bargain hunter, especially a refurbished handset paired with a keen SIM tariff, as long as you test the signal of the network underpinning your chosen plan.

Get your Mozillion deal in 3 steps

Choose your deal

Select your ideal Mozillion plan from trusted retailers. Filter by data, price and contract length to find your perfect match.

Get your PAC code

Keep your current number by texting 'PAC' to 65075. It's free and takes minutes.

Complete your order

Finish your application with Mozillion. Your new SIM will be delivered and your number transferred automatically.

Eco impact

Our impact grows with you

Every successful switch through Switchity plants 2 trees through our verified reforestation partner, Ecologi. Our switchers have already captured over 5,240 kg of CO₂ and released nearly 26,986 kg of oxygen annually.

262 / 1000 trees26% to goal
Verified reforestation partner: Ecologi
Best Environmentally-Focused Comparison Platform 2026, SME News
2
Trees per switch
5,240+ kg
CO₂ captured
£25,000+
Customer savings

Mozillion SIM-only deals: FAQs

Ready to switch?

Pick your Mozillion SIM-only plan from the comparison above, or browse every UK network we cover.

See all SIM-only deals

Our community impact

Every switch through Switchity supports reforestation and saves our community money on their broadband.

262
Trees grown together
£25,000
Saved by community
£250
Typical yearly saving
738
Trees to go to goal
Claudia Constantin
Written by Claudia Constantin, Co-Founder & Managing EditorPublished