> ## Documentation Index
> Fetch the complete documentation index at: https://support.quo.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Text messaging

> Send SMS and MMS messages, use AI-suggested responses, and manage attachments with comprehensive messaging features

## Overview

Quo, formerly OpenPhone's text messaging supports both SMS and MMS messages with rich features including AI-suggested responses, file attachments, and multimedia content. Send pictures, videos, documents, and GIFs to communicate effectively with customers and team members.

<CardGroup cols={1}>
  <Card title="Prefer a walkthrough?" icon="graduation-cap" href="https://learn.quo.com/setting-up-quo/using-calls-texts-and-contacts/texting-overview?utm_source=content&utm_medium=resource_center&utm_campaign=quo_academy&utm_content=resource_center" cta="Start learning ">
    Access interactive demos, videos, and more in the Quo Academy.
  </Card>
</CardGroup>

## Sending messages

### Basic text messages

**Character limits:**

* **Single SMS**: 160 characters maximum. If you send a longer text, your recipients will not notice this limit as modern devices will reassamble the message for the reader.
* **Extended messages**: Up to 1,600 characters (split into segments)
* **Unicode/Emoji messages**: 70 characters per segment

Messages longer than 160 characters are automatically split into segments of 153 characters each and reassembled by the recipient's device.

<Note>
  Messages exceeding 1,600 characters will fail to send. Break long content into multiple messages.
</Note>

## Multimedia messaging (MMS)

### Sending pictures and attachments

<Tabs>
  <Tab title="Web/Desktop">
    1. Click the **📎** icon next to "Write a message"
    2. Upload your image or file
    3. Add your message text and send

    <Frame>
      <img src="https://mintcdn.com/resource-center/0GrhW1hgmsu1D0vm/images/core-concepts-messaging/how-to-send-picture-messages-m_attaching-an-image-with-a-mess_9ece7e49.png?fit=max&auto=format&n=0GrhW1hgmsu1D0vm&q=85&s=acf1728522a66c168e1d36bb5e31dc53" alt="Attaching an image in Quo web interface" style={{ maxHeight:"450px" }} width="1550" height="1372" data-path="images/core-concepts-messaging/how-to-send-picture-messages-m_attaching-an-image-with-a-mess_9ece7e49.png" />
    </Frame>
  </Tab>

  <Tab title="Mobile">
    1. Click the **🖼** icon in your messaging thread
    2. Take a photo or upload from your library
    3. Add your message text and send

    <Frame>
      <img src="https://mintcdn.com/resource-center/0GrhW1hgmsu1D0vm/images/core-concepts-messaging/how-to-send-picture-messages-m_attach-an-image-with-a-message_87d3be80.png?fit=max&auto=format&n=0GrhW1hgmsu1D0vm&q=85&s=6dfbc688d29447892abb7e4b9641524f" alt="Attaching an image in Quo mobile app" style={{ maxHeight:"450px" }} width="500" height="889" data-path="images/core-concepts-messaging/how-to-send-picture-messages-m_attach-an-image-with-a-message_87d3be80.png" />
    </Frame>

    You can also copy and paste images directly into conversations.
  </Tab>
</Tabs>

### File size and image limits

**Attachment limits:**

* **Maximum file size**: 5MB per message
* **Images per message**: Up to 10 images
* **Supported formats**: JPEG, PNG, GIF, PDF, and other common file types

### Carrier-specific MMS limits

Different carriers have varying size limits for receiving MMS:

**US/Canadian local numbers:**

* **AT\&T**: 0.6MB
* **T-Mobile**: 1.5MB
* **Verizon**: 0.675MB

**Toll-free numbers**: 0.6MB standard limit

<Tip>
  For best compatibility, keep attachments under 600KB when unsure of the recipient's carrier.
</Tip>

### Picture quality

Quo automatically resizes images under 5MB that exceed receiving carrier limits. For best picture quality when the recipient's carrier is unknown, send images under 600KB.

## Supported content types

You can send various types of content through Quo:

* **Pictures (MMS)**: JPEG, PNG, and other image formats
* **Videos**: Video files within size limits
* **GIFs**: Use GIPHY integration by typing "/" in message field
* **Documents**: Spreadsheets, PDFs, and other file types
* **Contacts**: Share contact information
* **Reactions**: Emoji reactions to messages

## AI-suggested responses

### How AI responses work

Quo uses AI to suggest 2-3 relevant replies based on conversation context. Available on all platforms (web, desktop, iOS, Android) for all users.

### Using AI suggestions

1. **Basic suggestions**: Type `/AI` in any conversation to get context-based response options
2. **Custom prompts**: Type `/AI` followed by specific instructions

<Frame>
  <img src="https://mintcdn.com/resource-center/Oi787GasxIck_Pyc/images/core-concepts-messaging/how-to-get-ai-suggested-text-r_ai-message-response-example-in_fbbfa7ca.png?fit=max&auto=format&n=Oi787GasxIck_Pyc&q=85&s=863e3bf6445bdf5dd5dd61c89f1f354a" alt="AI message response suggestions in Quo" style={{ maxHeight:"450px" }} width="1600" height="821" data-path="images/core-concepts-messaging/how-to-get-ai-suggested-text-r_ai-message-response-example-in_fbbfa7ca.png" />
</Frame>

**Example prompt**: "/AI Create a short, friendly text that confirms a customer's appointment on Monday at 9 am."

<Frame>
  <img src="https://mintcdn.com/resource-center/61u1An6gUrVf-Smk/images/core-concepts-messaging/how-to-get-ai-suggested-text-r_example-of-a-prompt-added-to-g_28f097c3.png?fit=max&auto=format&n=61u1An6gUrVf-Smk&q=85&s=df1bf2b4adb2abb8f62c40b50750f4b2" alt="AI prompt example for generating custom responses" style={{ maxHeight:"450px" }} width="1600" height="826" data-path="images/core-concepts-messaging/how-to-get-ai-suggested-text-r_example-of-a-prompt-added-to-g_28f097c3.png" />
</Frame>

<Tip>
  Save useful AI-generated responses as snippets for future reuse.
</Tip>

## Message management

### Saving and storing messages

Messages are automatically saved when you mark conversations as "done":

1. Mark conversation as **Done**
2. Access saved messages using the **Done** filter
3. Messages stored indefinitely unless manually deleted

<Frame>
  <img src="https://mintcdn.com/resource-center/61u1An6gUrVf-Smk/images/core-concepts-messaging/how-to-save-and-store-messages_cleanshot_2022-11-19_at_131258_3f0c051f.png?fit=max&auto=format&n=61u1An6gUrVf-Smk&q=85&s=035d35e4c72ac41f953c4525f7528e96" alt="Done filter for accessing saved messages" style={{ maxHeight:"450px" }} width="3229" height="2035" data-path="images/core-concepts-messaging/how-to-save-and-store-messages_cleanshot_2022-11-19_at_131258_3f0c051f.png" />
</Frame>

<Warning>
  If subscription is cancelled, message data is only guaranteed for 14 days. Export data before cancellation if needed.
</Warning>

### Message limitations

**Cannot unsend messages**: Unlike peer-to-peer platforms, SMS messages sent through carrier networks cannot be recalled once delivered.

**Bulk image download**: Images must be downloaded individually - bulk download is not currently available.

**Character limit failures**: Messages exceeding 1,600 characters will fail with an error message.

<Frame>
  <img src="https://mintcdn.com/resource-center/8lhuScSltRbkg8Kf/images/core-concepts-messaging/what-are-the-file-size-and-cha_shortened-text-received-in-ope_c9861f2a.png?fit=max&auto=format&n=8lhuScSltRbkg8Kf&q=85&s=6fa6affe7545710195beb43ab706e24b" alt="Failed message due to character limit" style={{ maxHeight:"450px" }} width="1129" height="1219" data-path="images/core-concepts-messaging/what-are-the-file-size-and-cha_shortened-text-received-in-ope_c9861f2a.png" />
</Frame>

## Troubleshooting

<AccordionGroup>
  <Accordion title="Message failed to send">
    Check message length (under 1,600 characters) and file size (under 5MB). Break long messages into multiple parts if needed.
  </Accordion>

  <Accordion title="Images not delivering">
    Verify attachment size is under carrier limits (600KB recommended). Large images are automatically resized but may still fail delivery.
  </Accordion>

  <Accordion title="AI responses not working">
    Ensure you're typing "/AI" exactly in the message field. Feature works on all platforms for all Quo users.
  </Accordion>

  <Accordion title="Can't find saved messages">
    Use the "Done" filter to view conversations marked as complete. Messages remain stored unless manually deleted.
  </Accordion>

  <Accordion title="Unicode character issues">
    Messages with emojis or special characters are limited to 70 characters per segment instead of 160 for standard text.
  </Accordion>
</AccordionGroup>