For seamless mobile data in London, an eSIM like EastESIM offers excellent coverage across all major networks including EE, Vodafone, and O2. You can purchase and download your eSIM online before you even depart, receiving it instantly via email. This allows for activation upon arrival at Heathrow (LHR) or Gatwick (LGW) without needing to find a physical store.
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What's the best eSIM for London travel and where can I buy it?
Updated May 30, 2026
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