Compare ASDA Mobile SIMs: 100GB for £10, 25GB for £8
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We compare the whole SIM only range on ASDA to find the ones that come out best in price comparisons with other networks. Last updated: 6th April 2026.
ASDA's best SIM only deals
The best overall ASDA Mobile SIM only deal this month
just
£10
a month
✔ Unlimited mins and 100GB data See full deal
at mobile.asda.com
(opens in new window)
We think ASDA Mobile's best value option on SIM only this April is their discounted £16 £10 a month plan below, which comes with 100GB data, plus unlimited minutes and texts on a 12‑month deal:
That means a total saving of £72 when you add up the £6 discount over 12 months.
If you're open to joining other networks than ASDA, you can actually get a similar deal for less, even with providers whose SIMs also use the Vodafone network. See the networks that beat it here:
We also like their £8 for 25GB plan
just
£8
a month
✔ Unlimited mins and 25GB data See full deal
at mobile.asda.com
(opens in new window)
For people who don't need that much data, you might like the discounted £14 £8 SIM only deal running on ASDA Mobile at the moment. It's a 12‑month plan, which comes with 25GB data, unlimited minutes and texts too:
In total, that discount of £6 a month means you’re looking at a saving of £72 over the 12‑month deal.
While it's good enough to be in our pick of ASDA's best SIM only deals, other providers do still have similar plans for less, even ones that also use the Vodafone network. Here are the networks where it'd cost less:
Their 10GB for £6 SIM is another good option
just
£6
a month
✔ Unlimited mins and 10GB data See full deal
at mobile.asda.com
(opens in new window)
If that'd be too much data for you, we'd say this is one of ASDA's best deals on SIM only this month too. It's a discounted 12‑month plan, comes with 10GB data, unlimited minutes and texts for £8 £6 a month:
Getting £2 off a month means you’ll save £24 over the course of your 12‑month deal.
It's definitely one of ASDA's best. But it's not market-leading. You can get a similar plan on other providers for less, even if you need your SIM to use the Vodafone network. See which networks that are cheaper here:
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How ASDA compare for SIM only prices and benefits
In our review of ASDA Mobile, we said we liked the fact that ASDA share the same coverage and 4G speeds as their hosts Vodafone (5G is capped on their unlimited plans) as well as having WiFi calling and 4G calling.
They sell all of their SIM only plans as monthly bundles of mins, texts and data. This can be set to auto-renew every month. That lets you switch plans each month without being stuck on a contract.
In terms of price, they’re generally one of the cheapest providers, as well as having some of the most competitive small data plans of all providers on the Vodafone network.
ASDA still include inclusive roaming in these 36 EU destinations. Their low-cost data add-ons and extra parental controls also make them great for putting your kids onto a new plan.
Useful link: Read our full ASDA Mobile review
Good things to know about ASDA’S SIM only plans
Your ASDA SIM will arrive between 2-3 working days after ordering. Your SIM package will contain every size of SIM to fit into any phone. ASDA don’t offer eSIMs (here are all the networks that do).
It’s your right as a customer to get a refund for anything you buy online. So if you’re not satisfied with your ASDA SIM you can return it within 14 days to get a full refund. Here’s how you can do it.
Since you’re paying for everything up front with ASDA, you won’t have to pass a credit check for your SIM. All you have to do is set up an account with your details so they know who you are.
To switch from your old network to ASDA while keeping your number, you’ll need to request a PAC from your old provider and give it to ASDA whenever. For more details follow their instructions here.
Useful link: Compare all ASDA Mobile SIMs