sms

Use a three-message flow: Send 1 at 30 minutes after abandonment with a gentle reminder and no discount, Send 2 at 4 hours with soft urgency, and Send 3 at 24 hours with a discount if margins allow. Each message needs a sender ID, one CTA with a short link, and a STOP opt-out footer on the first send.

Klaviyo SMS fits brands already using Klaviyo for email since it shares one subscriber profile, while Postscript offers the deepest Shopify-specific SMS features. Attentive suits mid-market brands wanting full-service support, and Twilio fits custom API-driven builds.

No. US TCPA requires express written consent for marketing SMS, captured with clear disclosure language, frequency expectations, and STOP/HELP instructions. Checkout phone number collection only covers transactional messages, and violations carry $500 to $1,500 per message in statutory damages.

Emojis force UCS-2 encoding, which shrinks a segment from 160 GSM-7 characters to 70 characters, often doubling the billed segments per message. Curly quotes and accented characters pasted from word processors trigger the same effect, so preview segment counts before scheduling.

A2P 10DLC registration is required since 2022 for US businesses sending SMS over standard 10-digit long codes, handled through The Campaign Registry via your platform. Without it, carriers throttle or filter your messages even when delivery status appears successful.

An opt-out rate above 4 percent signals audience fatigue from over-sending or poor relevance, since healthy programs stay under 2 percent per send and under 0.5 percent for promotional messages. Reduce frequency, segment by engagement, and run a re-engagement flow before sending more promotions.