Which network has the best SIM plan in the UK?

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The best overall networks:
The best networks for data:
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The best 1-month rolling networks:

There are now a lot of SIM only deals available in the UK ranging from the likes of EE and Vodafone through to a bunch of lesser-known brands with unique selling points...so which one is the best?

You'll likely be sad (but not surprised) to hear that there is no definitive answer. Each and every brand has developed a unique selling point which helps it stand above the competition.

There is the big four - Vodafone, Three, EE and O2 - and then there is all of the MVNOs which piggy-back on the signals of those main choices. Piggy-backing doesn't mean other options are any weaker so choosing one of the main four doesn't put you at any advantage there.

In fact, the best way to decide which SIM plan is the best is to decide what matters most to you. If you just need a SIM for a couple of months as a stop-over then the likes of Smarty, Voxi or GiffGaff with their rolling contracts will be ideal.

Then if speed is the most crucial factor, EE or any of the MVNO's that lean on it will be the key choice. Those who burn through data will find that Three is consistently the best choice.

Whatever factor is most important to you when it comes to SIM only deals, we've broken them down below.

See the best unlimited data SIM only deals

The best overall networks:

The best networks for data:

The best networks for speeds:

The best 1-month rolling networks:

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We've also featured the best global SIM.

Alex is a journalist who has written extensively about all things broadband, SIMs and phone contracts, as well as scouring the internet to land you the best prices on the very latest in gadgets and tech. Whether that be with the latest iPhones and Android handsets, breaking down how broadband works or revealing the cheapest SIM plans, he's in the know, and will help you land a bargain.