Cheapest SIM
GiffGaff 40 GB SIM-only
SIM onlyNo contract4G/5G
Data
40 GB
Calls
Unlimited
Contract
No contract
Network
O2
£15/mo
£10
/mo
Save £60/yr
SIM-Only & Mobile Comparison
Compare SIM-only and mobile plans in the UK. No broadband, no contract.
8 deals
8 deals
Prices checked on
EE 100 GB SIM-only
SIM only24 months5G
Data
100 GB
Calls
Unlimited
Contract
24 months
£32/mo
£20
/mo
Save £144/yr
Voxi Unlimited SIM-only
SIM onlyNo contract5G
Data
Unlimited
Calls
Unlimited
Contract
No contract
Network
Vodafone
£15
/mo
Endless video streaming
Tesco Mobile 30 GB SIM-only
SIM only12 months
Data
30 GB
Calls
Unlimited
Contract
12 months
Network
O2
£13
/mo
Clubcard discount available
O2 100 GB SIM-only
SIM only24 months5G
Data
100 GB
Calls
Unlimited
Contract
24 months
£25/mo
£15
/mo
Save £120/yr
Three Unlimited SIM-only
SIM onlyNo contract5G
Data
Unlimited
Calls
Unlimited
Contract
No contract
£18
/mo
Roam in 71 destinations
iD Mobile 100 GB SIM-only
SIM only12 months5G
Data
100 GB
Calls
Unlimited
Contract
12 months
Network
Three
£20/mo
£12
/mo
Save £96/yr
SMARTY Unlimited SIM-only
SIM onlyNo contract5G
Data
Unlimited
Calls
Unlimited
Contract
No contract
Network
Three
£16
/mo
No contract, no price rises