Is it haram to talk to a potential spouse on the phone or WhatsApp?

Talking to a potential spouse on the phone or WhatsApp is not automatically haram, but the nature, tone, and intention of those conversations determine whether it stays halal or crosses a line. Islam permits brief, purposeful, and respectful communication for the genuine purpose of assessing compatibility before marriage. What makes it haram is when conversations become frequent, casual, or emotionally intimate in a way that mirrors a relationship before any commitment exists. The Islamic principle is simple: if it would be inappropriate face-to-face, it is equally inappropriate on WhatsApp.