The UK has only four network coverage providers: EE, O2, Three and Vodafone. … Mobile Networks Using O2 Coverage: Best SIM Cards With Coverage From O2. O2 Coverage:99% UK population coverageBest Unlimited Data Plan:£30/month on O2 (with 5G coverage and 6 months free Disney+ or Amazon Prime Video)Mobile Networks Using O2 Coverage: Who Uses O2 & Best SIM Cards kenstechtips.com › index.php › mobile-networks-using-o2-coverage