Cheapest 5G Sim-only deals 2021

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With 5G now changing into extra commonplace in even low cost cellphones, and extra suppliers providing 5G knowledge in 2021, it’s by no means been extra tempting to get entangled.

Thankfully, there are a selection of offers out there that may making selecting up a 5G Sim a no brainer, whether or not you’re a excessive knowledge person or simply fancy a extra responsive shopping expertise.

Beneath, we’ve rounded up a few of the finest offers you could find, for low, medium and excessive knowledge quantities to swimsuit all cell customers.


Uncover the best and worst UK mobile networks, or use Which? Swap Cellular to seek out the best Sim-only deals on a variety of suppliers.


Greatest 5G Sim-only offers

Low knowledge 5G offers (lower than 5GB)

These offers are finest for individuals who don’t usually use cell knowledge or solely use cell knowledge for gentle actions comparable to internet shopping and light-weight social media utilization. All include limitless minutes and texts.

Medium knowledge 5G offers (5GB – 10GB)

Go for a bit extra knowledge if you happen to generally watch movies use social media closely when out and about.

Excessive knowledge 5G offers (over 10GB)

These offers are for individuals who play on-line video games, watch a whole lot of movies and repeatedly use and add to social media when out and about.

Limitless knowledge 5G offers

These offers are nice for individuals who want to tether or in any other case use their cellphone extensively and don’t wish to fear about how a lot knowledge they’re utilizing. Unsurprisingly, Three dominates right here as probably the most cost-effective limitless knowledge Sim supplier.


5G telephones are now not costly – in actual fact we’ve got discovered Greatest Buys for beneath £300. Browse our 5G phone reviews for extra.


What are the advantages of 5G?

The 2 foremost advantages of 5G are velocity and capability. 5G can deal with much more than 4G and might do it quicker. This has the potential in future to be transformative, for instance, with internet-connected merchandise and driverless vehicles, to call a few use instances.

For now, this implies you possibly can stream greater high quality content material, play video games simpler and customarily have a greater cell knowledge expertise, in principle.

For extra, learn our guide to 5G. You may also discover out extra concerning the rumours surrounding 5G.

What about protection?

One factor you’ll wish to look into earlier than you shell out is 5G protection in your space.

Our mobile networks coverage map contains details about 5G protection the place you reside in addition to 4G protection for all 4 main cell networks (EE, O2, Three and Vodafone), which all different networks piggyback off.

Get to know your new supplier

Earlier than you turn, it’s price wanting into your new supplier to ensure they tick the bins. We repeatedly survey clients of 13 main cell networks to seek out out their views on the whole lot from customer support and ease of contacting the supplier. Learn our detailed mobile provider reviews for extra.

Do you have to keep or must you go?

In the event you’ve discovered a deal that you just like, however you’re in any other case pleased along with your supplier, you is perhaps a bit reluctant to modify. You can attempt haggling with your mobile provider to see if they’ll match or higher the deal, but when they gained’t, switching is perhaps the best choice. Thankfully, it’s fairly simple to do – our information on how to switch mobile network provider explains how.

Our information to getting the best Sim-only deal contains common roundups of the most well liked offers round. Pondering of fixing broadband supplier? Our information to the best broadband deals will help with that, too.

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