Capture the phone number, not just the email

When to use it

When the capture offer only asks for email, mobile share is above 50%, and the account sells in markets where messaging apps lead.

How to run it

1. 1Run a two-step signup: email first, then an SMS or WhatsApp opt-in with its own incentive, like early access or a shipping perk.
2. 2Split the channel by region: SMS for US traffic, WhatsApp for EU and LatAm.

Why it works

Raise the perceived value of acting

A phone list holds its value much longer than an email list. SMS lists churn ~2% a year against ~20% for email.

Source: Attentive/Forrester TEI; Klaviyo WhatsApp rollout; Alia two-step data