This 30-day £5 SIM only deal is ideal to keep your old phone going until Black Friday

Saving money on mobiles, the smart way

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SIM only deals can save you a lot of money whichever you look at them and we've got a corker for you today. We're especially keen on it as it has a decent amount of data for you to use each month and it's a rolling 30-day contract, meaning you're not tied down for long at all.

We've found that both 30-day and 12-month SIM only deals, if you shop around, are so much cheaper than a new mobile phone contract. 30-day deals are ideal if you've come to the end of your current contract and are undecided on what phone to get next. Or more likely, these short-term SIM-only deals are excellent to keep you going until Black Friday, when the big flagship phones get their best deals. We're talking discount time on the Samsung Galaxy S9, iPhone X and upcoming handsets like the Samsung Galaxy Note 9 and iPhone 9 and many more, too.

Sure, you could just keep your expired phone contract rolling over-month-by-month until you spot a new contract you want, but we're fairly certain you're still paying over the odds for the minutes and data allowances you're getting – you've paid off the phone itself now, remember!

The best SIM only deal in the UK this week

iD SIM only | 1 month rolling contract | 2.25GB | 5000 texts | 250 mins | £5 a month
iD uses the same mobile network as Three, so you've got great UK coverage. This deal is usually £5 for just 1GB of data, so the increase to 2.25GB is excellent value – nobody does more data for less, even on a 12-month deal. Worried about the amount of data? Unless you're a serial streamer away from Wi-Fi, we generally find this is plenty for most users. You probably have a function in your phone's settings somewhere that shows you how much mobile data you use each month outside of Wi-Fi to give you an idea. And yes, you can keep your old phone number even from a different network.
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If you do need more data or minutes, there are plenty of other options to consider. If you're quite content with your current phone, there are some decent 12-month options available too. Check out our SIM only comparison chart below and adjust the filters to your requirements to find the right fit for you.

More of the best SIM only deals