O2's 5G SIM only deal with 20GB data is insanely good value

(Image credit: O2)

last updated 18 March 2020

SIM only deals are a great way to save money month after month, to the tune of hundreds of pounds per year. If you've got a handset you're happy with right now, buying SIM only rather than continually upgrading to the latest model phones can get you absurd amounts of data for less if you need it, or rock-bottom prices on your package if you don't.

Dynamite Voxi SIM only deal drops large data with no contract for just £10 p/m

Occasionally, those two aspects combine, allowing you to get an enormous data package extremely cheaply. For example, this great deal from Mobiles.co.uk on an O2 SIMcard allows you to get a big 20GB data package (more than enough for most smartphone users), unlimited minutes and texts and 5G access for as little as £8.00 per month. That's astonishingly good value.

Check out the deal in full below:

The way in which you're able to save money on this great SIM-only deal is Mobiles.co.uk's nifty cashback scheme: which does mean that initially, you'll be paying full price each month. However, simply follow the instructions at checkout and send your invoice for the listed amount on months 4, 8, 10 and 12 to save £144 on the total annual cost of your plan.

Want a great phone to go with this stellar O2 deal? Check out our best cheap phones, best 5G phones and best Android phones lists to find the right handset for you. Whether you want a cheap handset to save money on your total contract or a 5G phone to pair with this great-value data bundle, look no further than right here.

Still not satisfied? Check out a whole raft of other SIM only deals below.

Best SIM-only deals

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Red Pocket Mobile Phone Plan SIM GSMT

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Matt Evans now works for T3.com sister brand TechRadar, covering all things relating to fitness and wellness. He came to T3.com as staff writer before moving on, and was previously on Men's Health, and slightly counterintuitively, a website devoted to the consumption of Scotch whiskey. In his free time, he could often be found with his nose in a book until he discovered the Kindle.