Cold Email + Phone: How to Combine Calls With Email Outreach

Adding phone calls to your cold email sequence can significantly increase conversion rates, especially for high-value prospects.

When to add phone

Phone is most effective as a follow-up to email, not as a cold call. When a prospect has opened your email but not replied, a phone call catches them at a moment of awareness — they have seen your name and have context for the call.

The email-phone combo

Day 1: Send email. Day 3: Send follow-up email. Day 5: Call. Reference the email: "Hi {{firstName}}, I sent you an email earlier this week about {{topic}}. Wanted to quickly follow up and see if it resonated." Day 8: Send another email. Day 11: Call again if no response. Day 14: Final email (breakup).

Phone call best practices for email follow-up

Keep the call brief. You are not pitching — you are following up on the email and gauging interest. Reference the email specifically. "I sent you an email on Tuesday about {{topic}}" gives the prospect context. Have a quick CTA ready. "Would you be open to a 15-minute chat this week to explore this?" If yes, book it on the spot.

Getting phone numbers

Apollo, ZoomInfo, and Lusha provide direct phone numbers for many B2B contacts. LinkedIn profiles sometimes include phone numbers. Verify numbers before calling to avoid wasting time on outdated data.