Compare SIM-only deals

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Compare monthly voice-SIM contracts from O2, giffgaff, iD Mobile and Mobiles.co.uk. Prepaid bundles, travel eSIMs and data-only plans are not included yet.

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147 offers · Last refreshed 20 Oct 2026, 13:09

Vodafone SIM card

Vodafone

30GB data (5G)

Unlimited minutes · Unlimited texts

Red SIM Only 30GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 12-month contract

Rises to £12.50 from 1 Apr 2027

£135.00 estimated minimum-term cost (listed rises included)

£10.00 cashback advertised: Cashback paid automatically. Not deducted from our costs; eligibility and retailer terms apply.

iD Mobile SIM card

iD Mobile

100GB data (5G)

Unlimited minutes · Unlimited texts

5G SIM Only 100GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 24-month contract

£240.00 estimated minimum-term cost

£96.00 cashback advertised: Cashback by redemption. Not deducted from our costs; eligibility and retailer terms apply.

iD Mobile SIM card

iD Mobile

100GB data (5G)

Unlimited minutes · Unlimited texts

5G SIM Only 100GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 24-month contract

£240.00 estimated minimum-term cost

£30.00 cashback advertised: Cashback paid automatically. Not deducted from our costs; eligibility and retailer terms apply.

Vodafone SIM card

Vodafone

30GB data (5G)

Unlimited minutes · Unlimited texts

Red SIM Only 30GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 12-month contract

Rises to £12.50 from 1 Apr 2027

£135.00 estimated minimum-term cost (listed rises included)

£36.00 cashback advertised: Cashback by redemption. Not deducted from our costs; eligibility and retailer terms apply.

iD Mobile SIM card

iD Mobile

120GB data (5G)

Unlimited minutes · Unlimited texts

5G SIM Only 120GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 12-month contract

£120.00 estimated minimum-term cost

£30.00 cashback advertised: Cashback paid automatically. Not deducted from our costs; eligibility and retailer terms apply.

iD Mobile SIM card

iD Mobile

120GB data (5G)

Unlimited minutes · Unlimited texts

5G SIM Only 120GB · Sold by Mobiles.co.uk

£10.00 a month

£0.00 upfront · 12-month contract

£120.00 estimated minimum-term cost

£48.00 cashback advertised: Cashback by redemption. Not deducted from our costs; eligibility and retailer terms apply.

Vodafone SIM card

Vodafone

60GB data (5G)

Unlimited minutes · Unlimited texts

Red SIM Only 60GB · Sold by Mobiles.co.uk

£11.00 a month

£0.00 upfront · 24-month contract

Rises to £13.50 from 1 Apr 2027

Rises to £16.00 from 1 Apr 2028

£324.00 estimated minimum-term cost (listed rises included)

£168.00 cashback advertised: Cashback by redemption. Not deducted from our costs; eligibility and retailer terms apply.

Vodafone SIM card

Vodafone

60GB data (5G)

Unlimited minutes · Unlimited texts

Red SIM Only 60GB · Sold by Mobiles.co.uk

£11.00 a month

£0.00 upfront · 24-month contract

Rises to £13.50 from 1 Apr 2027

Rises to £16.00 from 1 Apr 2028

£324.00 estimated minimum-term cost (listed rises included)

£85.00 cashback advertised: Cashback paid automatically. Not deducted from our costs; eligibility and retailer terms apply.

O2 SIM card

O2

120GB data (5G)

Unlimited minutes · Unlimited texts

SIM Only Classic · Sold by O2

£12.00 a month

£0.00 upfront · 1-month plan

£12.00 estimated first-month cost

This is not an annual cost. Check renewal and cancellation terms.

O2 SIM card

O2

120GB data (5G)

Unlimited minutes · Unlimited texts

SIM Only Classic · Sold by O2

£12.00 a month

£0.00 upfront · 12-month contract

Rises to £14.50 from 1 Apr 2027

£159.00 estimated minimum-term cost (listed rises included)

iD Mobile SIM card

iD Mobile

150GB data (5G)

Unlimited minutes · Unlimited texts

5G SIM Only 150GB · Sold by Mobiles.co.uk

£12.00 a month

£0.00 upfront · 24-month contract

£288.00 estimated minimum-term cost

£36.00 cashback advertised: Cashback paid automatically. Not deducted from our costs; eligibility and retailer terms apply.

Vodafone SIM card

Vodafone

100GB data (4G)

Unlimited minutes · Unlimited texts

Basics SIM Only · Sold by Mobiles.co.uk

£12.00 a month

£0.00 upfront · 12-month contract

Rises to £13.50 from 1 Apr 2027

£153.00 estimated minimum-term cost (listed rises included)

£60.00 cashback advertised: Cashback by redemption. Not deducted from our costs; eligibility and retailer terms apply.

Before you switch

Monthly sorting and the price cap use the standard price after any introductory discount, before future rises. Average cost is the estimated minimum-term cost divided by its length, not a guaranteed ongoing bill. Cashback is never deducted. Some retailers sell the same plan.

Check coverage where you live and work, your phone’s compatibility, minimum term, cancellation rules and any credit check. A one-month plan cost is not a yearly cost. Listed rises are included in our estimate; missing rises do not mean a price freeze. Check current prices, renewal terms and eligibility with the retailer before applying.

We may earn commission through retailer links. Saved SIM plans have their own comparison group, separate from phones. SIM-only deals are not yet included in the phone-finder assistant.

SIM-only or a phone contract? · How to keep your number when switching

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