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Asda Mobile 12-month SIM only deals

An Asda Mobile 12-month SIM only deal offers Vodafone network coverage with a lower monthly price than a shorter commitment.

Which network does Asda Mobile's 12-month SIM use?

Asda Mobile runs on the Vodafone network, so a 12-month Asda Mobile SIM gives you Vodafone's 4G and 5G coverage across the UK.

It's worth checking Vodafone's coverage at your home and work before you commit, as that's the signal you'll actually be using.

Is a 12-month Asda Mobile SIM a good middle option?

A 12-month Asda Mobile deal sits between a flexible rolling plan and a longer 24-month contract, locking in a lower monthly price for a year without tying you in for two.

It suits people who are settled on their phone and happy to commit for 12 months in return for better value than a one-month plan.

Our top pick
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Unlimited speed

ASDA mobile 100GB 12-month SIM

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £216
Price
£18per month
100084
Get deal
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Unlimited speed

ASDA mobile Unlimited Data 12-month SIM

Data
Unlimited
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £264
Price
£22per month
Get deal

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Unlimited speed

ASDA mobile 10GB 12-month SIM

Data
10 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £71.40
Price
£5.95per month
Get deal
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Unlimited speed

ASDA mobile 25GB 12-month SIM

Data
25 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £84
Price
£7per month
Get deal
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Unlimited speed

ASDA mobile 50GB 12-month SIM

Data
50 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £95.40
Price
£7.95per month
Get deal
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Unlimited speed

ASDA mobile 3GB 12-month SIM

Data
3 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £48
Price
£4per month
Get deal
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Unlimited speed

ASDA mobile 100GB 12-month SIM

Data
100 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £144
Price
£12per month
Get deal
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Unlimited speed

ASDA mobile 80GB 12-month SIM

Data
80 GB
(Unlimited speed included)
Allowances
Unlimited minutes
Unlimited texts
Contract
12 months
Total cost: £114
Price
£9.50per month
Get deal

Asda Mobile runs its SIM-only service over Vodafone's network, giving it access to the same underlying coverage as one of the UK's major operators while typically pricing itself as a more budget-friendly alternative. Its 12-month plans sit between the total flexibility of a rolling monthly SIM and the longer two-year commitment some providers push, offering a middle-ground option for anyone comfortable planning a year ahead.

1. Why choose a 12-month term with Asda Mobile

Committing to 12 months with Asda Mobile typically unlocks a better price than its rolling SIM-only deals, while still being back on the open market within a year rather than two. This suits anyone who wants a meaningfully lower monthly cost without the longer commitment of a 24-month deal.

2. Asda Mobile and Vodafone's network

Because Asda Mobile runs over Vodafone's network, coverage should generally match what Vodafone itself offers in your area. It's worth checking Vodafone's coverage specifically for the places you spend the most time, since this determines your real-world experience regardless of the Asda Mobile branding on your SIM.

3. Data allowance and value

As with any SIM-only deal, compare the specific data allowance on offer against your typical usage. If you're not sure how much data you need, our guide to mobile data usage can help you work out a sensible allowance before choosing a plan.

4. Comparing Asda Mobile's contract lengths

Asda Mobile typically offers several contract lengths, so it's worth comparing this 12-month option against its 24-month deals, its general SIM-only range, and its unlimited data plans to find the best combination of price and commitment for your needs. If price is your absolute priority, also check our cheapest Asda Mobile deals guide.

5. Frequently asked questions

What network does Asda Mobile use?
Asda Mobile runs its SIM-only service over Vodafone's network, giving it access to the same underlying coverage as Vodafone's own customers.

Is a 12-month Asda Mobile contract cheaper than 24 months?
Typically the monthly price is a little higher than an equivalent 24-month deal, in exchange for a shorter overall commitment. Compare the total cost across both terms before deciding.

Can I switch to Asda Mobile and keep my existing number?
Yes, you can transfer your existing number using a PAC code, which your current provider is required to give you free of charge.

What happens if I want to leave my Asda Mobile contract before 12 months is up?
You'll typically need to pay for the remaining months on the contract, so it's worth being confident about your plans before committing to the full term.

6. Conclusion

Asda Mobile's 12-month SIM-only deals offer a sensible middle ground between flexibility and price, backed by Vodafone's network coverage. Compare this option against Asda Mobile's other contract lengths and data allowances to find the best fit for your usage and commitment preferences.