GigSky does not offer a Guernsey eSIM that provides a local phone number or SMS capability. Travelers who need to make calls or send text messages would need to rely on VoIP services such as WhatsApp, Telegram, or iMessage over the data connection. However, access to these apps can be restricted in some destinations, so it is advisable to confirm that the services you plan to use are available in Guernsey before purchasing a plan.