Best ASDA Mobile SIM deals: 100GB for £10, 25GB for £8
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Find the best priced SIM only plans on ASDA this month. We've compared them all against the rest of the market. Last updated: 9th January 2026.
ASDA's best SIM only deals
Our best-rated 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)
From all the options ASDA Mobile have got available this January on SIM only, we think this discounted £16 £10 12‑month deal is their best. For your £10 a month, you get 100GB data alongside unlimited minutes and texts:
It’s a discount of £6 a month against the full price, adding up to a £72 saving over the 12 months.
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. See who's offering it for less here:
Their 25GB for £8 SIM is another good option
just
£8
a month
✔ Unlimited mins and 25GB data See full deal
at mobile.asda.com
(opens in new window)
If you need less data, another good deal on ASDA Mobile at the moment is their discounted £14 £8 SIM only plan here, which includes 25GB data instead, plus unlimited minutes and texts:
That discount will save you £6 a month, which adds up to £72 over the course of the 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. Here's where you can beat it on other networks:
ASDA's 10GB for £6 plan is a good option too
just
£6
a month
✔ Unlimited mins and 10GB data See full deal
at mobile.asda.com
(opens in new window)
For a smaller amount of data, our next best pick of ASDA Mobile SIM only plans is their discounted 12‑month £8 £6 deal below, which gets you 10GB data and unlimited minutes and texts:
That’s £24 you’ll save over 12 months with the deal thanks to the £2 monthly discount.
Even though it's in our pick of ASDA's best SIM only deals, you can actually beat it on price with other providers, including ones that also use the Vodafone network. See lower-priced networks' deals 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