The majority of CoreESIM UK plans are provisioned exclusively for data services. For voice communication and messaging, users are advised to leverage over-the-top (OTT) applications such as WhatsApp, FaceTime Audio/Video, Telegram, or Skype, which utilize the data connection. Should a local UK telephone number be a functional requirement, Voice over IP (VoIP) services or virtual number providers offer viable alternatives for inbound and outbound calls/SMS.
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Do CoreESIM UK plans include voice and SMS capabilities?
Updated April 22, 2026
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