GulfData does not offer any eSIM plans for Guernsey that include a phone number or SMS capability. The provider only offers data‑only eSIMs for this destination. Travelers who need to make calls or send messages can use VoIP applications such as WhatsApp, Telegram, or iMessage over the data connection; however, some services may be partially blocked or restricted in Guernsey, so it is advisable to confirm that the apps you rely on are accessible before purchasing a plan.