GigSky does not offer eSIM plans for Kazakhstan that include a local phone number or SMS capability. All of its plans for this destination are data‑only, so travelers will have to rely on internet‑based messaging and calling services. Popular VoIP applications such as WhatsApp, Telegram, and iMessage can normally be used over the data connection for calls and messages, but users should verify that these apps are accessible in Kazakhstan before purchasing, as some destinations may block or limit certain VoIP services.