If your messages aren’t going through, it’s usually due to a problem with the carrier or incorrect login details. Keep in mind that each country has its own messaging rules, which can also affect delivery.

If a message doesn’t appear in your outgoing report, check how the SMS was sent to help identify the issue. For detailed troubleshooting steps, refer to What to do if a message is not in my outgoing report?

Please be aware that delivery receipts may not be available in all countries.

Here are the key factors that could be affecting SMS delivery:

Available Credit in your account  

Make sure your account has enough credit to send messages. If your balance is low, top up and resend. Messages attempted without credit won’t send automatically after a top-up—you’ll need to resend them or contact the CLiX support team for help.

API Request not received

Make sure your API request is accurate and that no parameters are missing.

Invalid Numbers 

If your delivery status shows “Invalid Number,” the destination number may not be recognized by CLiX. Please verify that it’s formatted correctly in international format, including the appropriate country code and number of digits.

SMS messages can’t be delivered to landline numbers. If the number entered is a landline, the message will be rejected. To confirm the number’s validity, consider running an MNP Lookup. Ask our support team for assistance. 

Recipients Handset 

If the recipient’s phone is out of range or turned off, delivery may be delayed. The system will retry sending the message, and the status should update within 48–72 hours.

The recipient may have changed their mobile number or switched carriers, which can prevent message delivery.

Invalid Sender ID 

An “Undelivered” status may indicate that the Sender ID used is not valid for the destination country. Sender ID support varies by region due to local regulations. Please verify that your Sender ID is permitted in the country you’re sending messages to.

Content Message 

Review your message content carefully—some countries have regulations that may prevent certain messages from being delivered.

For instance, the delivery may be impacted if:

1. There’s a URL in the body of your message.
2. Your message contains references to gambling, betting, or adult-related content.
3. There is a Unicode in your message.
4. Your message has been divided into multiple segments. In some cases, longer multipart messages—typically those exceeding 4 or 5 parts—may encounter delivery issues depending on the destination.

For additional help with delivery issues, please reach out to CLiX support.

To assist our support team in investigating your case, please include as many relevant details as possible in your ticket, especially:

1. Your CLiX username 
2. Mobile Numbers of the recipient
3. Time & Date when sent 
4. The Country you are sending to and the Sender ID you are using to send 
5. Sending method ( API, Email to SMS, CXT Portal)