SMS links not working in Gmail

Gmail and do not support the SMS protocol used to create SMS links.

Gmail completely strips the HREF attribute when you use the SMS protocol. This happens not only in the mobile application but also in the web client. modifies the markup deleting the entire link tag. Buttons may disappear from your email, remaining as only text strings without a link.

Because both clients have these issues, when sending an SMS is the primary CTA, we recommend adding a fallback text string: "Button/link not working? Send an SMS straight through: +01 963658..."

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