Updated May 7, 2026 · Jules de Bruin, Editor
Updated May 2026. London commuters need three things from a SIM: signal on the Tube, 5G availability above ground, and a price that justifies the network premium. The four UK networks deliver these differently. O2 wins time-on-5G at 77.8%; Three wins raw 5G speed at 193.8 Mbps; EE wins consistency at 80.4%; Vodafone wins reliability at 916 points. The Elizabeth line works on all four; the rest of the Tube rolls out gradually. Pick by host network family, then choose the retail brand for your budget.
Full guide expanding soon. The data and rankings live on the UK comparison hub; this dedicated page will host the long-form analysis in the next content sprint. Switch to the hub to see all 28+ plans filtered live.