sms

Use a 3-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 STOP opt-out language on the first send.

Klaviyo SMS is the default pick if you already use Klaviyo for email, since it shares one subscriber profile. Postscript offers the deepest Shopify-specific SMS features, while Attentive suits mid-market brands wanting full-service support.

No. TCPA requires express written consent for marketing SMS, captured with clear disclosure language, frequency expectations, and STOP/HELP instructions. Checkout phone capture only covers transactional messages related to that specific order.

A2P 10DLC registration is required since 2022 for US business SMS sent over 10-digit long codes, handled through The Campaign Registry via your platform. Without it, carriers throttle or filter your messages even if they show as delivered.

Emojis force UCS-2 encoding, which shrinks a segment from 160 GSM-7 characters to 70, so a single emoji can double your billed segments per send. Curly quotes and accented characters pasted from Word or Google Docs trigger the same effect.

Keep opt-out rates under 2% per send overall and under 0.5% for promotional sends. Rates above that signal over-sending or poor relevance; reduce frequency, segment by engagement, and run re-engagement flows for cold subscribers.