When sending a message to a large list, it's common to have a few failed numbers, or subscriber numbers that didn't (or couldn't) receive your message.
Common reasons for failed numbers
Mobile number has been deactivated by their wireless carrier.
Landline number (typically from a third-party integration, ChMS, or an imported file).
Message has been filtered out by the recipient's wireless carrier. Learn more about carrier filtering here.
Some contacts may have short-code messaging blocked with their wireless plan (often unbeknownst to them). If you use a short code, we recommend using a long code as a fallback option.
You can view failures by going to the Messages page > Select your message > Scroll down to the Message Activity table > Set the Filter by status to Failed.
Credits used for failed messages are automatically reimbursed within a few seconds. If you'd like more info on why a message failed, reach out to our team and we can look into it for you.