Meet 2020’s Cheapest Unlimited Data SIM-Only Plan (Inc. FREE 5G)

By Thomas Niemczewski •  Updated: 01/13/20 •  3 min read

Got a new phone? Looking for a cheap, unlimited data plan but don’t want to get locked into a contract for 18-24 months? No problem – we have just the plan for you!


If you own your own phone and aren’t locked to a carrier, you’re spoilt for choice when it comes to SIM-only plans. But finding the right balance of data and price can often be tricky, however, Three has one of the best truly unlimited SIM-only data plans for 2020 – bar none!

For just £22 a month (over 12 months), you’ll get totally unlimited data, unlimited calls, and unlimited texts. And if that wasn’t enough, the plan from Three also includes 5G connectivity at no extra cost. This is handy, especially if you update your phone mid-way through the year as all newer phones released in 2020 will support 5G.

What Else Does It Include?

Is Three Mobile Good?

Yes. I’ve been a customer of Three for almost 10 years now! And during this time, I’ve never had any issues. Coverage, even in rural areas, is great. Data speeds are fast, and you get truly unlimited data, meaning there are NO caps.

How do I know this? Simple: when I moved to a new house a few years ago, I used Three’s Personal Hotspot for ALL my internet needs for 8 days, including streaming, gaming, and working. During that time, we clocked up around 60GB of data usage and there was no extra charge.

This – as well as the free-roaming – has kept me as a dedicated Three user all this time. I’m on a rolling contract, as I go through about 20-30 phones a year (perks of the job). But if I were a normal punter looking for a great SIM-only deal for a phone that I already own, I’d be all over Three’s Advanced Plan – it’s the cheapest “truly unlimited” data plan for the UK by a considerable margin.

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Thomas Niemczewski

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