Unlimited Data SIM Only Deals

Compare unlimited data SIM plans, including 5G SIMs and rolling monthly contracts.

Cheapest Deal

Vodafone 100GB SIM Only

£5.13/month

Best Value

Vodafone 100GB SIM Only

£5.13/month

Vodafone 100GB SIM Only

Vodafone

100GB SIM-only plan with unlimited calls and texts.

100GB 12 months Vodafone

£5.13

per month

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VOXI 10GB SIM Only

VOXI

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month VOXI

£5.22

per month

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O2 10GB SIM Only

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month O2

£5.26

per month

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Tesco Mobile 20GB SIM Only

Tesco Mobile

20GB SIM-only plan with unlimited calls and texts.

20GB 1 month Tesco Mobile

£5.31

per month

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Sky Mobile 50GB SIM Only

Sky Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 12 months Sky Mobile

£5.55

per month

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O2 50GB SIM Only

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days O2

£5.59

per month

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Tesco Mobile 50GB SIM Only

Tesco Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 1 month Tesco Mobile

£5.70

per month

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Giffgaff 50GB SIM Only

Giffgaff

50GB SIM-only plan with unlimited calls and texts.

50GB 24 months Giffgaff

£5.84

per month

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VOXI Unlimited SIM Only

VOXI

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 12 months VOXI

£6.08

per month

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Giffgaff 100GB SIM Only

Giffgaff

100GB SIM-only plan with unlimited calls and texts.

100GB 1 month Giffgaff

£6.24

per month

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Giffgaff 50GB SIM Only

Giffgaff

50GB SIM-only plan with unlimited calls and texts.

50GB 1 month Giffgaff

£6.35

per month

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Vodafone 10GB SIM Only

Vodafone

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month Vodafone

£6.67

per month

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VOXI 50GB SIM Only

VOXI

50GB SIM-only plan with unlimited calls and texts.

50GB 12 months VOXI

£7.77

per month

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Sky Mobile 150GB SIM Only

Sky Mobile

150GB SIM-only plan with unlimited calls and texts.

150GB 30 days Sky Mobile

£8.05

per month

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iD Mobile Unlimited SIM Only

iD Mobile

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 12 months iD Mobile

£8.10

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 24 months Lebara

£8.26

per month

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Giffgaff 20GB SIM Only

Giffgaff

20GB SIM-only plan with unlimited calls and texts.

20GB 12 months Giffgaff

£8.43

per month

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Three 10GB SIM Only

Three

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Three

£8.78

per month

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Three 10GB SIM Only

Three

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Three

£8.80

per month

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Vodafone 50GB SIM Only

Vodafone

50GB SIM-only plan with unlimited calls and texts.

50GB 24 months Vodafone

£8.88

per month

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Vodafone 50GB SIM Only

Vodafone

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days Vodafone

£8.95

per month

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Sky Mobile 100GB SIM Only

Sky Mobile

100GB SIM-only plan with unlimited calls and texts.

100GB 12 months Sky Mobile

£9.41

per month

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Tesco Mobile Unlimited SIM Only

Tesco Mobile

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 12 months Tesco Mobile

£9.70

per month

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VOXI 150GB SIM Only

VOXI

150GB SIM-only plan with unlimited calls and texts.

150GB 30 days VOXI

£10.04

per month

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Vodafone 5GB SIM Only

Vodafone

5GB SIM-only plan with unlimited calls and texts.

5GB 1 month Vodafone

£10.20

per month

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O2 10GB SIM Only

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month O2

£10.36

per month

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Tesco Mobile 5GB SIM Only

Tesco Mobile

5GB SIM-only plan with unlimited calls and texts.

5GB 1 month Tesco Mobile

£11.06

per month

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Tesco Mobile 30GB SIM Only

Tesco Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 24 months Tesco Mobile

£11.60

per month

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Tesco Mobile 30GB SIM Only

Tesco Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 12 months Tesco Mobile

£11.70

per month

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Three 50GB SIM Only

Three

50GB SIM-only plan with unlimited calls and texts.

50GB 12 months Three

£11.70

per month

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Vodafone 30GB SIM Only

Vodafone

30GB SIM-only plan with unlimited calls and texts.

30GB 12 months Vodafone

£12.05

per month

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VOXI Unlimited SIM Only

VOXI

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 1 month VOXI

£12.16

per month

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EE 150GB SIM Only

150GB SIM-only plan with unlimited calls and texts.

150GB 24 months EE

£12.95

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 30 days Lebara

£12.98

per month

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iD Mobile 50GB SIM Only

iD Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days iD Mobile

£13.03

per month

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VOXI 30GB SIM Only

VOXI

30GB SIM-only plan with unlimited calls and texts.

30GB 12 months VOXI

£13.32

per month

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Sky Mobile 100GB SIM Only

Sky Mobile

100GB SIM-only plan with unlimited calls and texts.

100GB 12 months Sky Mobile

£13.93

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 1 month Lebara

£14.20

per month

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Tesco Mobile 150GB SIM Only

Tesco Mobile

150GB SIM-only plan with unlimited calls and texts.

150GB 1 month Tesco Mobile

£14.43

per month

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Tesco Mobile 150GB SIM Only

Tesco Mobile

150GB SIM-only plan with unlimited calls and texts.

150GB 1 month Tesco Mobile

£14.56

per month

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EE 30GB SIM Only

30GB SIM-only plan with unlimited calls and texts.

30GB 1 month EE

£14.58

per month

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O2 100GB SIM Only

100GB SIM-only plan with unlimited calls and texts.

100GB 24 months O2

£15.09

per month

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Vodafone 20GB SIM Only

Vodafone

20GB SIM-only plan with unlimited calls and texts.

20GB 24 months Vodafone

£15.18

per month

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O2 150GB SIM Only

150GB SIM-only plan with unlimited calls and texts.

150GB 12 months O2

£15.27

per month

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EE Unlimited SIM Only

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 1 month EE

£15.34

per month

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Giffgaff 50GB SIM Only

Giffgaff

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days Giffgaff

£15.92

per month

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Three 50GB SIM Only

Three

50GB SIM-only plan with unlimited calls and texts.

50GB 24 months Three

£16.12

per month

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EE 10GB SIM Only

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days EE

£16.13

per month

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Lebara 150GB SIM Only

Lebara

150GB SIM-only plan with unlimited calls and texts.

150GB 1 month Lebara

£16.19

per month

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EE 150GB SIM Only

150GB SIM-only plan with unlimited calls and texts.

150GB 12 months EE

£16.25

per month

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Lebara 5GB SIM Only

Lebara

5GB SIM-only plan with unlimited calls and texts.

5GB 1 month Lebara

£16.88

per month

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Sky Mobile 10GB SIM Only

Sky Mobile

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Sky Mobile

£16.90

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 30 days Lebara

£17.18

per month

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VOXI 50GB SIM Only

VOXI

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days VOXI

£17.52

per month

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iD Mobile Unlimited SIM Only

iD Mobile

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 30 days iD Mobile

£17.86

per month

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iD Mobile 50GB SIM Only

iD Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days iD Mobile

£18.24

per month

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Giffgaff 100GB SIM Only

Giffgaff

100GB SIM-only plan with unlimited calls and texts.

100GB 30 days Giffgaff

£18.64

per month

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Three Unlimited SIM Only

Three

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 1 month Three

£18.70

per month

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Lebara 10GB SIM Only

Lebara

10GB SIM-only plan with unlimited calls and texts.

10GB 12 months Lebara

£18.81

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 30 days Lebara

£19.02

per month

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iD Mobile 30GB SIM Only

iD Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 24 months iD Mobile

£19.48

per month

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Tesco Mobile 20GB SIM Only

Tesco Mobile

20GB SIM-only plan with unlimited calls and texts.

20GB 30 days Tesco Mobile

£19.77

per month

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O2 10GB SIM Only

10GB SIM-only plan with unlimited calls and texts.

10GB 12 months O2

£20.02

per month

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VOXI Unlimited SIM Only

VOXI

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 1 month VOXI

£20.68

per month

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Sky Mobile 10GB SIM Only

Sky Mobile

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Sky Mobile

£20.86

per month

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Tesco Mobile 10GB SIM Only

Tesco Mobile

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month Tesco Mobile

£21.82

per month

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O2 100GB SIM Only

100GB SIM-only plan with unlimited calls and texts.

100GB 12 months O2

£22.30

per month

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EE Unlimited SIM Only

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 30 days EE

£22.48

per month

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Lebara 30GB SIM Only

Lebara

30GB SIM-only plan with unlimited calls and texts.

30GB 1 month Lebara

£22.48

per month

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Giffgaff 20GB SIM Only

Giffgaff

20GB SIM-only plan with unlimited calls and texts.

20GB 1 month Giffgaff

£22.67

per month

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Vodafone 10GB SIM Only

Vodafone

10GB SIM-only plan with unlimited calls and texts.

10GB 12 months Vodafone

£22.75

per month

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Vodafone 10GB SIM Only

Vodafone

10GB SIM-only plan with unlimited calls and texts.

10GB 24 months Vodafone

£23.04

per month

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Giffgaff 150GB SIM Only

Giffgaff

150GB SIM-only plan with unlimited calls and texts.

150GB 30 days Giffgaff

£23.95

per month

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Vodafone 10GB SIM Only

Vodafone

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Vodafone

£24.11

per month

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Vodafone 20GB SIM Only

Vodafone

20GB SIM-only plan with unlimited calls and texts.

20GB 12 months Vodafone

£24.18

per month

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Sky Mobile 5GB SIM Only

Sky Mobile

5GB SIM-only plan with unlimited calls and texts.

5GB 30 days Sky Mobile

£24.21

per month

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iD Mobile 50GB SIM Only

iD Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 1 month iD Mobile

£24.22

per month

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Giffgaff 10GB SIM Only

Giffgaff

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days Giffgaff

£24.23

per month

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Lebara Unlimited SIM Only

Lebara

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 30 days Lebara

£24.33

per month

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Giffgaff 20GB SIM Only

Giffgaff

20GB SIM-only plan with unlimited calls and texts.

20GB 24 months Giffgaff

£24.68

per month

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Lebara Unlimited SIM Only

Lebara

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 1 month Lebara

£24.78

per month

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Sky Mobile 10GB SIM Only

Sky Mobile

10GB SIM-only plan with unlimited calls and texts.

10GB 24 months Sky Mobile

£25.05

per month

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VOXI 5GB SIM Only

VOXI

5GB SIM-only plan with unlimited calls and texts.

5GB 1 month VOXI

£25.43

per month

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EE 100GB SIM Only

100GB SIM-only plan with unlimited calls and texts.

100GB 24 months EE

£25.49

per month

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Three 150GB SIM Only

Three

150GB SIM-only plan with unlimited calls and texts.

150GB 12 months Three

£25.51

per month

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Tesco Mobile 5GB SIM Only

Tesco Mobile

5GB SIM-only plan with unlimited calls and texts.

5GB 24 months Tesco Mobile

£25.85

per month

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VOXI 20GB SIM Only

VOXI

20GB SIM-only plan with unlimited calls and texts.

20GB 30 days VOXI

£25.88

per month

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Sky Mobile 20GB SIM Only

Sky Mobile

20GB SIM-only plan with unlimited calls and texts.

20GB 30 days Sky Mobile

£26.04

per month

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O2 30GB SIM Only

30GB SIM-only plan with unlimited calls and texts.

30GB 30 days O2

£26.06

per month

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Sky Mobile 100GB SIM Only

Sky Mobile

100GB SIM-only plan with unlimited calls and texts.

100GB 12 months Sky Mobile

£26.17

per month

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Sky Mobile 10GB SIM Only

Sky Mobile

10GB SIM-only plan with unlimited calls and texts.

10GB 24 months Sky Mobile

£26.19

per month

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O2 Unlimited SIM Only

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 24 months O2

£26.63

per month

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EE 20GB SIM Only

20GB SIM-only plan with unlimited calls and texts.

20GB 30 days EE

£26.72

per month

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iD Mobile 30GB SIM Only

iD Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 24 months iD Mobile

£26.75

per month

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iD Mobile 50GB SIM Only

iD Mobile

50GB SIM-only plan with unlimited calls and texts.

50GB 30 days iD Mobile

£26.82

per month

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Giffgaff 10GB SIM Only

Giffgaff

10GB SIM-only plan with unlimited calls and texts.

10GB 1 month Giffgaff

£27.00

per month

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Lebara 5GB SIM Only

Lebara

5GB SIM-only plan with unlimited calls and texts.

5GB 12 months Lebara

£27.57

per month

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iD Mobile 5GB SIM Only

iD Mobile

5GB SIM-only plan with unlimited calls and texts.

5GB 24 months iD Mobile

£27.65

per month

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Giffgaff 150GB SIM Only

Giffgaff

150GB SIM-only plan with unlimited calls and texts.

150GB 24 months Giffgaff

£27.99

per month

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Lebara 10GB SIM Only

Lebara

10GB SIM-only plan with unlimited calls and texts.

10GB 12 months Lebara

£28.42

per month

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Sky Mobile 30GB SIM Only

Sky Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 24 months Sky Mobile

£28.42

per month

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Vodafone 5GB SIM Only

Vodafone

5GB SIM-only plan with unlimited calls and texts.

5GB 24 months Vodafone

£29.58

per month

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iD Mobile 5GB SIM Only

iD Mobile

5GB SIM-only plan with unlimited calls and texts.

5GB 1 month iD Mobile

£30.22

per month

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VOXI 10GB SIM Only

VOXI

10GB SIM-only plan with unlimited calls and texts.

10GB 30 days VOXI

£30.44

per month

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Lebara Unlimited SIM Only

Lebara

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 30 days Lebara

£30.64

per month

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iD Mobile 30GB SIM Only

iD Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 12 months iD Mobile

£30.66

per month

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Three 50GB SIM Only

Three

50GB SIM-only plan with unlimited calls and texts.

50GB 12 months Three

£31.02

per month

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Tesco Mobile Unlimited SIM Only

Tesco Mobile

Unlimited SIM-only plan with unlimited calls and texts.

Unlimited 24 months Tesco Mobile

£31.17

per month

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iD Mobile 100GB SIM Only

iD Mobile

100GB SIM-only plan with unlimited calls and texts.

100GB 30 days iD Mobile

£31.30

per month

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Three 20GB SIM Only

Three

20GB SIM-only plan with unlimited calls and texts.

20GB 24 months Three

£31.30

per month

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Three 100GB SIM Only

Three

100GB SIM-only plan with unlimited calls and texts.

100GB 24 months Three

£31.65

per month

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iD Mobile 30GB SIM Only

iD Mobile

30GB SIM-only plan with unlimited calls and texts.

30GB 12 months iD Mobile

£31.71

per month

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Unlimited Data SIM Only Deals

Unlimited data SIM only deals can be useful if you stream, browse, tether or use mobile data regularly.

SIM only plans are often cheaper than phone contracts because you are not paying for a handset.

When comparing unlimited data SIMs, check the network, 5G availability, fair usage policy, roaming rules and contract length.

Unlimited Data SIM Only Deals FAQs

Is unlimited data worth it?

Unlimited data can be worth it if you use lots of mobile data for streaming, tethering, gaming or browsing.

Can I get 5G unlimited data SIMs?

Yes, many UK networks offer 5G unlimited data SIM only deals.

Are 30 day unlimited SIMs available?

Yes, some networks offer rolling 30 day unlimited data SIM plans, although longer contracts may be cheaper.