What Are the Current Best Mozillion SIM Only Deals?

If you want the short answer first, the current best Mozillion SIM only deals are not all sitting in one neat bracket. The strongest picks right now split into three camps: the 1-month plan if flexibility matters most, the 12-month Pay Monthly Plus deals if you want a more balanced middle ground, and the 24-month Pay Monthly Plus deals if your main goal is pushing the equivalent monthly cost down. Before you buy, it is also worth checking our Mozillion Voucher Codes page, because that is the obvious place to look if you want to see whether there is an extra saving available alongside the live SIM pricing.

That said, “best” gets misused a lot in mobile content. A plan can look cheap at a glance and still not be the best fit once you notice how much data you actually use, whether you want to stay flexible, or whether part of the saving comes from paying some of the cost upfront. Mozillion’s live SIM pages make that especially relevant because its standard Pay Monthly SIMs include 1-month options, while Pay Monthly Plus works differently and spreads the remaining cost across either 12 or 24 months after an upfront payment. Mozillion’s Pay Monthly SIM page and Pay Monthly Plus page both spell that out.

What actually makes a Mozillion SIM only deal the best one?

Price matters, obviously, but it is not the only thing worth looking at. A cheaper equivalent monthly figure can lose some of its shine if you do not want to hand over a bigger payment at the start, and a rolling 1-month deal can be the smarter move if you are changing provider, testing signal in a new area, or just not ready to commit for longer than you have to.

Mozillion’s own help pages confirm that its monthly SIM only plans can start from a minimum contract period of one month, while other plan types can run for 12 to 24 months. The same help section also says Mozillion supports 4G and 5G, though you will still need a compatible handset and suitable local coverage for 5G to mean much in practice. That is why postcode checking matters more than broad marketing claims. Ofcom’s Map Your Mobile checker is useful here because it lets you check which network offers the best 4G or 5G signal where you actually live and use your phone, while Mozillion also has its own joining and setup help page and data and internet access help page covering plan length and 5G support.

Best current Mozillion SIM only deal for flexibility

If flexibility matters more than shaving every last pound off the long-term cost, the strongest current Mozillion option is the 100GB 1-month SIM only plan at £13 per month. Mozillion lists that deal on its standard Pay Monthly SIM page, alongside unlimited calls and texts, EU roaming, no credit check and no mid-contract price rises. For someone who wants room to move, that is a pretty sensible starting point rather than a compromise pick. Mozillion’s live Pay Monthly SIM listings show the 100GB 1-month plan at £13 per month, and the related plan detail page confirms hotspot enabled, WiFi Calling, keeping your number and EU roaming.

You could argue the 30GB 1-month plan at £10 per month is the better flexible deal for lighter or average users, and there is a fair case for that. Not everybody needs 100GB. In fact, plenty of people do not come close. Still, if you stream a lot, hotspot occasionally, or just do not want to monitor your usage, the extra few pounds for the 100GB version feels easier to justify than landing on a plan that looks cheap but starts to feel tight halfway through the month. Mozillion’s current pay monthly listings also show the 30GB 1-month plan at £10 per month.

Best current Mozillion SIM only deal for balanced value over 12 months

For many people, the sweet spot is not the rolling plan and not the longest term either. It is the 12-month middle ground, where the price comes down but the commitment still feels manageable. On Mozillion’s live Pay Monthly Plus page, the standout 12-month options at the time of writing are 30GB equivalent to £7 per month, 80GB equivalent to £8.50 per month and 100GB equivalent to £10 per month. Mozillion shows these as Pay Monthly Plus deals where you pay part of the cost upfront, then the rest across the term. The page also states that Pay Monthly Plus is available on 12 or 24-month terms and is designed to be better value than the standard Pay Monthly SIM options. You can see those current figures on Mozillion’s Pay Monthly Plus SIM page.

If I had to narrow that down for the broadest number of shoppers, the 30GB and 80GB 12-month deals are probably the most interesting ones. The 30GB option feels like the better-value everyday choice if your usage is fairly normal and you spend a decent amount of time on WiFi. The 80GB option makes more sense if your phone is your main screen when you are out and about, or if you stream music and video heavily without wanting to step all the way up to 100GB. The 100GB 12-month deal is still strong, just not automatically the smartest buy for everyone simply because it is bigger.

Best current Mozillion SIM only deal for the lowest equivalent monthly cost

If your only real aim is to bring the equivalent monthly cost down as far as you reasonably can, the 24-month Pay Monthly Plus deals are where Mozillion looks strongest right now. On the live page, Mozillion lists 100GB equivalent to £7 per month, 80GB equivalent to £6 per month, 30GB equivalent to £5.50 per month and 10GB equivalent to £5 per month. Those are attractive numbers, especially once you compare them with the standard rolling monthly prices on the regular SIM page. The catch is not hidden, but it does matter: Pay Monthly Plus involves paying 50% of the total plan cost upfront and the remaining balance monthly over the term. Mozillion explains that directly on the Pay Monthly Plus information and pricing page.

That is why the cheapest-looking deal is not always the easiest deal to buy. Some shoppers would rather pay a bit more each month and avoid the bigger upfront hit. Others will look at the longer-term maths and decide it is worth it. If you are in the second camp, the 30GB and 80GB 24-month plans stand out particularly well because the equivalent monthly pricing is low without drifting into the “far more data than I will ever use” territory. And if you are checking ways to cut the overall cost before you commit, this is another sensible point to look at our Mozillion Voucher Codes page alongside Mozillion’s live plan rates.

What you get with Mozillion SIM only plans besides the headline price

Price is the thing that gets attention, but the extra plan features do make a difference. Mozillion’s current SIM plan pages say its pay monthly SIMs include free EU roaming, no credit check and no mid-contract price rises. The plan detail page for the 100GB 1-month SIM also lists hotspot enabled, WiFi Calling and the option to keep your number. Those are not small details. They are the sort of things that stop a deal from becoming annoying once you are actually using it. You can check those features on the main Pay Monthly SIM page and the 100GB 1-month plan page.

Mozillion’s help content also says all its SIM plans include 4G and 5G data as standard, though 5G still depends on device compatibility and suitable coverage in your area. That is a fair reminder not to treat “5G included” as a magic phrase. It only matters if it works where you are. Mozillion confirms 4G and 5G support in its data and internet access help article and in the joining and setup help section.

Who these Mozillion SIM only deals suit best

Mozillion’s SIM only deals make the most sense if you already own a phone you are happy with and you want to reduce what you pay each month without getting dragged into a handset bundle you do not need. They also work well for people who are willing to compare real total cost rather than just reacting to whichever price looks the lowest on the page. That sounds obvious, but in mobile deals it often gets missed.

They are probably less appealing if you know you hate longer commitments, if upfront payments put you off, or if you have not checked local signal properly yet. Coverage is the part people tend to assume will be fine until it is not. So before calling any deal the best one for you, it is worth spending two minutes on Ofcom’s mobile coverage checker and then comparing that with Mozillion’s own support guidance.

Our verdict on the current best Mozillion SIM only deals

Right now, the best Mozillion SIM only deal for flexibility looks like the 100GB 1-month plan at £13 per month, simply because it gives you plenty of room without tying you in. For balanced value, the 30GB and 80GB 12-month Pay Monthly Plus deals are the ones that feel strongest. And if you are focused on the lowest equivalent monthly cost, the 24-month Pay Monthly Plus range is where Mozillion is most competitive, especially around 30GB, 80GB and 100GB.

That is the honest answer. Not one winner for everybody, but a few current standouts depending on how you use your phone and how comfortable you are with upfront cost versus monthly cost. Just make sure you compare the live figures on Mozillion’s standard Pay Monthly SIM page and its Pay Monthly Plus page before buying, because SIM pricing can move.

By Julian House 30th March 2026