Ensure the contact section includes a field where the customer can input their phone number.
Search for Phone label. In the fields called Phone label and Optional phone label paste the following:
English: Phone - mark the above checkbox to get SMS updates.
German: Telefon - markieren Sie die obige Checkbox, um Updates via SMS zu erhalten.
French: Téléphone - cochez la case ci-dessus pour recevoir des mises à jour SMS.
Then save the changes by clicking the Save button at the top of that page.
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