Yes, to seamlessly use any travel eSIM, including your Truly Roaming eSIM in London, your mobile phone must be unlocked by your home carrier. An unlocked device is essential because it allows you to install and activate an eSIM profile from a different provider, like Truly Roaming. This ensures you can access reliable 4G or 5G data across the UK's robust networks, connecting you to carriers such as EE or Vodafone without any restrictions.
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Does my smartphone require unlocking to utilize a Truly Roaming eSIM in London?
Updated May 30, 2026
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