To utilize any CoreESIM profile, including those designated for London, your mobile device must be carrier-unlocked. An unlocked device is a technical necessity, permitting the installation and activation of an eSIM profile from an alternative network provider. This ensures your device can register with UK networks (e.g., EE, Vodafone UK, O2) and access 4G LTE-A and 5G data services without restriction, maintaining operational flexibility throughout your journey.
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What is CoreESIM's device unlocking prerequisite for London eSIM usage?
Updated May 30, 2026
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