Cheapest Unlimited Data SIM Deals UK | PAYM And PAYG

Searching for the cheapest possible unlimited data SIM you can buy in the UK?

Below, you’ll find the cheapest SIM deals with unlimited usage on the market at the moment.

Contents

Cheapest pay monthly unlimited data SIM deals

in
iD Mobile logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • Cashback paid automatically: £20.00
  • Prices that stay fixed
  • Unlimited Data
  • + More
Unlimited Monthly Data
£13.33 Average Monthly Cost
£15.00 Per Month
The Carphone Warehouse logo. View Deal
in
iD Mobile logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • Cashback paid automatically: £20.00
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£13.33 Average Monthly Cost
£15.00 Per Month
Mobiles.co.uk logo. View Deal
in
iD Mobile logo.
24 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • Cashback paid automatically: £48.00
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£14.00 Average Monthly Cost
£16.00 Per Month
Mobiles.co.uk logo. View Deal
in
iD Mobile logo.
24 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • Cashback paid automatically: £48.00
  • Prices that stay fixed
  • Unlimited Data
  • + More
Unlimited Monthly Data
£14.00 Average Monthly Cost
£16.00 Per Month
The Carphone Warehouse logo. View Deal
in
EE logo.
24 month contract
, New
  • Texts
  • Calls
  • Wi-Fi Calling
  • Data Gifting Service
  • + More
Unlimited Monthly Data
£14.12 Average Monthly Cost
£12.00 Per Month*
EE logo. View Deal

*Monthly cost will increase to £13.50 in March 2026, £15.00 in March 2027
in
iD Mobile logo.
24 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£14.88 Average Monthly Cost
£8.50 Per Month*
iD Mobile logo. View Deal

*Price increases to £17.00 after 6 months
in
iD Mobile logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£15.75 Average Monthly Cost
£9.00 Per Month*
iD Mobile logo. View Deal

*Price increases to £18.00 after 3 months
in
Three logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
Unlimited Monthly Data
£17.00 Average Monthly Cost
£17.00 Per Month*
Metrofone logo. View Deal

*Monthly cost will increase by approx. £1-£1.50 each April
in
Three logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
Unlimited Monthly Data
£17.00 Average Monthly Cost
£17.00 Per Month*
Fonehouse logo. View Deal

*Monthly cost will increase by approx. £1-£1.50 each April
in
Three logo.
12 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
Unlimited Monthly Data
£17.00 Average Monthly Cost
£17.00 Per Month*
Metrofone logo. View Deal

*Monthly cost will increase by approx. £1-£1.50 each April

Cheapest pay as you go (month to month) unlimited data SIM deals

in
EE logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • 24/7 Service Support
  • Wi-Fi Calling
  • + More
Unlimited Monthly Data
£7.00 Average Monthly Cost
£7.00 Per Month*
EE logo. View Deal

*Monthly cost will increase by approx. £1.50 each April
in
EE logo.
1 month contract
, New
  • Texts
  • Calls
  • Wi-Fi Calling
  • Data Gifting Service
  • + More
Unlimited Monthly Data
£13.00 Average Monthly Cost
£13.00 Per Month*
EE logo. View Deal

*Monthly cost will increase by approx. £1.50 each April
in
iD Mobile logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • Roaming
  • Data Rollover
  • + More
Unlimited Monthly Data
£15.00 Average Monthly Cost
£15.00 Per Month
The Carphone Warehouse logo. View Deal
in
iD Mobile logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£15.00 Average Monthly Cost
£15.00 Per Month
Mobiles.co.uk logo. View Deal
in
iD Mobile logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£15.00 Average Monthly Cost
£15.00 Per Month
iD Mobile logo. View Deal
in
EE logo.
1 month contract
, New
  • Texts
  • Calls
  • Wi-Fi Calling
  • Data Gifting Service
  • + More
Unlimited Monthly Data
£16.00 Average Monthly Cost
£16.00 Per Month*
EE logo. View Deal

*Monthly cost will increase by approx. £1.50 each April
in
iD Mobile logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • iD Mobile App
  • No speed caps
  • + More
Unlimited Monthly Data
£16.00 Average Monthly Cost
£16.00 Per Month
iD Mobile logo. View Deal
in
Talkmobile logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
  • No speed caps
  • Wi-Fi Calling
  • + More
Unlimited Monthly Data
£16.00 Average Monthly Cost
£16.00 Per Month
Talkmobile logo. View Deal
in
Smarty logo.
1 month contract
, New
  • Unlimited Texts
  • Unlimited Calls
Unlimited Monthly Data
£18.00 Average Monthly Cost
£18.00 Per Month
Smarty logo. View Deal
in
EE logo.
1 month contract
, New
  • Texts
  • Calls
  • Wi-Fi Calling
  • Data Gifting Service
  • + More
Unlimited Monthly Data
£19.00 Average Monthly Cost
£19.00 Per Month*
EE logo. View Deal

*Monthly cost will increase by approx. £1.50 each April

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