yaySIM does not offer eSIM plans with a phone number or SMS capability for Pakistan. The available plans are data‑only, so travelers cannot make regular voice calls or receive SMS directly through the local number. However, VoIP applications such as WhatsApp, Telegram, and iMessage can be used over the data connection for calls and messaging, though some destinations may block or restrict particular apps, so users should confirm the accessibility of these services in Pakistan before purchasing.