Why you'll love our unlimited data SIMs

Great value unlimited data

Yep, that’s right. The days of running out of data are over! From just £20 a month.

One month, no contracts

With us, you’re not locked in to anything. Flexible mobile is here to stay.

Incredible coverage

Get up to 99% UK population coverage with Asda mobile.

Unlimited calls and texts

Stay connected with your friends and family, you know they’ll appreciate it.

Superfast 5G speeds

Access unparalleled speeds up to 150Mbps. Stream without interruption!

Powered by Vodafone

We’re proud to use Vodafone, the UK’s reliable, award-winning network.

How it works

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Order your SIM

We'll dispatch your SIM first class the next working day

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Activate it online

You can register your online account whilst your SIM arrives

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Transfer your number

Login to your online account and follow the step by step instructions

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You're done!

And that's it! You can now enjoy all the benefits of our network

Why go unlimited?

Say goodbye to running out of data. With an unlimited data SIM, you can use your phone throughout the month without worry.

Stream, video call, download - do everything you love whenever, wherever.

unlimited data illustration

Go superfast with unlimited 5G

Get 5G coverage in 100 UK towns and cities! Take your connection to the next level with speeds up to 150Mbps!

All of our unlimited SIMs come with 5G at no extra cost.

Find out more
5g illustration

Go superfast with unlimited 5G

Get 5G coverage in 100 UK towns and cities! Take your connection to the next level with speeds up to 150Mbps!

All of our unlimited SIMs come with 5G at no extra cost.

Find out more

Fancy something different?

Check out our other great value monthly bundles

Pair with the perfect phone

Pair your unlimited data SIM with a brand new handset!

Whether you’re after a cutting-edge smartphone or like to keep things simple, you can find the perfect device with us.

Simply add an unlimited SIM at the checkout.

Shop phones
collection of mobile phone handsets

Frequently asked questions

Unlimited data is exactly what it sounds like. You won’t have a cap on how much you download or upload in a month, so you can use your data as much as you want without worrying!

A speed cap limits how quickly you can download or upload data. We offer three different speed caps depending on which unlimited bundle you choose.


Bundle price Speed cap (using 5G)
£20 2Mbps
£25 10Mbps
£30 150Mbps

Find out more about our speed caps.

Yes, all of our bundles include 4G as standard. We offer our customers 4G speeds up to 60mbps for downloads and up to 30mbps for uploads.

Yes you can! The 5G speeds you can get depends on which unlimited SIM plan you’re on:


Bundle price Speed cap (using 5G)
£20 2Mbps
£25 10Mbps
£30 150Mbps

When we say unlimited, we mean unlimited! As long as you are using your bundle within the UK (excluding Isle of Man and the Channel Islands), you’ll be fine.


The only time a fair usage limit applies is when you’re roaming. Please see FAQ “Can I use my unlimited data plan abroad?” for more details.

We offer unlimited data from £20 a month.

If you’re a new customer, simply order one of the SIMs above and you’ll get unlimited data! For existing customers, you can buy an unlimited bundle through My Account.

You can use your data, minutes, and texts as if you were in the UK in 36 European destinations. Outside of these locations, our rest of world charges apply.


All bundle customers have a 25GB data roaming limit regardless of the amount of data included in your bundle. Once you have 25GB of data you will be charged 4p per MB, the same as you would pay for data in the UK. You will receive notifications when you reach the 80% and 100% of the data limit.

Of course! All you need to do is make sure that your phone is unlocked, so that it’s compatible with an Asda mobile SIM. Find out more about unlocking phones.

You sure can. You can always bring your number with you when switching networks. To start, you need to request a PAC code from your current provider. The simplest way to do this is by texting ‘PAC’ to 65075 (free of charge) off your old SIM card. Once you have this code (which is valid for 30 days), you can let us know you want to transfer your number through your Asda mobile online account.

All of our bundles last for one calendar month.

Yep! You can set your bundles to automatically renew each month through your online account.

Yes, you could use your unlimited bundle as a replacement for cabled broadband, assuming your mobile signal is strong enough. You could use your Asda mobile phone as a personal hotspot (if your device allows this), letting you access the internet on another device (such as a laptop) using your Asda mobile data. To set up a personal hotspot, check your handset’s manual.


Alternatively, you could use your unlimited bundle SIM with a mobile broadband router or Wi-Fi dongle (assuming these devices are not locked to another network).