> For the complete documentation index, see [llms.txt](https://guides.clickatell.com/chat-desk/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.clickatell.com/chat-desk/agent-desk/chat-capabilities/send-1-way-sms.md).
# Send 1-way SMS
{% hint style="warning" %}
Note that 1-way SMS communication is not allowed in certain countries (e.g. USA), and this functionality will therefore not be available to customers in those countries
{% endhint %}
It can be used to:
* Provide a customer with the information they have requested after a chat has ended.
* Prompt the customer to initiate a conversation via a channel that connects them to an agent on Chat Desk.
## **Send a 1-way SMS**
{% hint style="success" %}
You can only send 1-way SMS messages to customer numbers that have been verified.
{% endhint %}
1. To verify a number, click the *Send OT*P button in the *Profile* tab.
2. Enter the phone number you want to verify and click *Send OTP*. The customer will be requested to enter the OTP in the channel to verify their number.
3. Your text field will be populated by an automatic response. Simply press *Enter* to send.
4. Once the number has been verified, you can send an SMS by selecting the *Send SMS* button on the top right of the chat header.
You can also initiate the process via the *Start Chat* button in the text box area (see below).
5. Choose to send an SMS and type the message. The **character limit is 160** per SMS.
{% hint style="warning" %}
This is a 1-way SMS, so an end-user will not be able to reply via SMS to the Agent Desk.
{% endhint %}
