30-day rolling, 12-month, PAC codes, and your Ofcom rights.
A SIM Only plan provides mobile data, calls, and texts on a SIM card — you supply your own unlocked phone. SIM Only is almost always significantly cheaper than an equivalent Pay Monthly handset contract. All major UK networks include 5G at no extra charge in 2026.
Cancel with 30 days' notice at any time. Maximum flexibility — ideal for testing a network. Typically costs slightly more per month than 12-month equivalents.
Commits you for one year at a lower monthly cost. Switch at month 12 using your PAC code. Maximum 24-month SIM Only under Ofcom rules.
Text PAC to 65075. Free 9-character code within minutes. Valid 30 days. Number transfers in one working day. Old contract auto-cancels. Text STAC to 75075 to leave without keeping your number. Text INFO to 85075 to check your contract end date and exit fee.
When a Pay Monthly contract ends, networks often auto-continue at the same price. Text INFO to 85075, then switch to SIM Only and save.
Three: Lite, Value (49 EU), Complete (163 countries) — 30-day or 12-month. New plans capped 100 Mbps from April 2026.
O2: 30-day, 12-month, 24-month. EU roaming free on all O2 plans.
EE: Essentials, Essentials Plus, All Rounder — uncapped 5G+ on All Rounder.
Tesco Mobile: Clubcard Price plans with frozen prices.
Vodafone: 30-day and 12-month options. Annual rises £2.50/month each 1 April.