Three SIM only deals
Use our expert analysis and filters to find the perfect SIM plan for your needs.
How good is Three's network coverage and 5G in the UK?
Three has invested heavily in 5G and offers wide coverage across most UK towns and cities, with strong data speeds in built-up areas.
Coverage in rural spots can be more variable, so it's worth checking Three's coverage map for your postcode before switching.
Do Three SIM only deals let me use my allowance abroad?
Many Three SIM only plans include Go Roam, which lets you use your allowance across a range of destinations, though the inclusive roaming terms have changed in recent years.
Always check the current roaming details for your specific plan before you travel.
Three UNL 12m SIM Only
Three UNL 12m SIM Only
UNLOCK EXCLUSIVE SAVINGS & DEALS
Join our savvy community and get insider access to the best broadband, power, mobile, and shopping deals – plus expert tips and money-saving guides delivered straight to your inbox.
Three 250GB 12m SIM Only
Three 250GB 12m SIM Only
Three 100GB 15pm 12m SIM Only
Three 100GB 15pm 12m SIM Only
Three 30GB 10pm 12m SIM Only
Three 30GB 10pm 12m SIM Only
Three 30GB 10pm 12m SIM Only
Three 30GB 14pm 24m SIM Only
Three 30GB 14pm 24m SIM Only
Showing 1 to 10 of 19 results
