Trifa does not provide any Singapore eSIM that includes a phone number or SMS capability. Their Singapore offerings are limited to data‑only plans, so travelers cannot receive or make voice calls through a traditional phone number or send SMS messages using the eSIM.
If a user needs voice or messaging, they can rely on VoIP applications such as WhatsApp, Telegram or iMessage over the data connection. However, some destinations may block or restrict access to certain VoIP services, so travelers should confirm that the apps they plan to use are available in Singapore before purchasing a Trifa eSIM.