Giga.Tel does not provide an eSIM for Singapore that includes a local phone number or the ability to send or receive SMS. Only data‑only eSIM plans are offered for this destination. Travelers can use VoIP applications such as WhatsApp, Telegram or iMessage over the data connection for calls and messaging, but access to these services can be restricted in certain locations, so it is advised to confirm that the apps you rely on are available in Singapore before purchasing a plan.