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Best SIM only deals for the January sales: from £5 a month to mega data and EE

sim only deals
(Image credit: Future)

Are you one of the lucky ones? Did a ridiculously generous partner or loved one go big this Christmas and buy you a brand new smartphone? To make the best of your great new gadget, you'll inevitably need to consider what SIM only deal to grab for your new device.

The good news is that quite a few retailers and networks have got into the spirit of the January sales and have been handing out cheap SIM only deals like they were candy. They range from the ridiculously cheap (how does a fiver a month sound?) to the absurdly good value (unlimited data for £18 per month anyone?) - basically, there's something for everyone.

So don't waste any more time...simply cast your eyes below, take your pick and then wait for your SIM to be delivered to your door in a few days.

  • Still looking for a new phone? Check our best SIM-free phone price guide

Our top 5 best January sales SIM only deals:

1. The completely unlimited one

SIM only from Three | 12 month contract | Unlimited data | Unlimited calls and texts | £18 a month
In our view, your search could start and end here. Three delivered this all time best value SIM only deal on Black Friday and it's still going strong. Bills for under £20 is good, but when you consider that you get unlimited data, calls and's unreal! We have no idea how much longer this might last, so lap it up if you don't want to miss out.
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2. The really, really cheap one

iD Mobile SIM only | 30-day contract | 1GB data | 500 minutes | Unlimited texts | £5 per month
If your New Year's resolution is to spend less on your phone bills, then iD has got you covered. Of course, 1GB of data each month won't suit the streaming commuters and social media obsessives of this world, but those £5 a month bills are amazingly tempting if you don't use your phone that much away from Wi-Fi. Or an extra quid a month doubles your data.
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3. The one with the fastest 4G speeds

EE SIM only | 12 months | 50GB data | Unlimited calls and texts | £24 per month
Unlike the iD offer above, this is for the 'power users' out there. The kind of person that needs super smooth streaming, really rapid downloading and a data limit that's not going to run out straight away. This 50GB data offer from EE - the UK's fastest 4G network - ticks all the boxes.View Deal

4. The one that doesn't tie you down

SIM only plan from Smarty | 1 month rolling | 30GB data | Unlimited calls and texts | £10 per month
Smarty is bringing the competition, offering a major 30GB of data for a mere £10 a month. And to make this offer even better, Smarty contracts only last for 1 month meaning you can stay for as long (or little) as you like. A real tempter if you hate the idea of being tied into a long commitment.
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5. The simply great value one

SIM only from Three | 12-month contract | 8GB data | Unlimited calls and texts | £8 per month
Yep, we're back to the numerical network. We really like this SIM only deal as it's a brilliant balance between data and affordability. Frankly, 8GB each month will be plenty for most folk and £8 per month barely feels like a hardship at all. Just another reason why Three SIM only deals are the cream of the current crop.View Deal