Troubleshooting SMS Reminder Delivery to International Numbers

If your SMS reminders are not being delivered to international numbers, such as Saudi phone numbers, the issue may be related to local telecom restrictions. We use Twilio to send SMS messages, and in some countries, delivery requires additional authorization. These restrictions are often due to legal requirements and the need for a dedicated local phone number.

To confirm whether this is the case, try sending a test message to a number from another country. If the SMS delivers successfully elsewhere, that typically indicates the issue is specific to the country in question. For regions like Saudi Arabia, enabling reliable delivery would involve working with Twilio to create a custom setup, which includes legal vetting and setting up a local sending number.

This kind of setup falls under our custom infrastructure process and is only available on our Enterprise plan. If your team is interested, we’re happy to provide more details and a timeline for what implementation would involve.