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

# Celluar documentation 

Learn to enable cellular functionality using ModemManager APIs and sample applications, and troubleshoot common connectivity issues.

## **Cellular overview**

<CardGroup cols={2}>
  <Card title="Cellular features" href="https://docs.qualcomm.com/doc/80-80023-24/topic/cellular-overview.html">
    Learn about the capabilities of the cellular technology features.
  </Card>

  <Card title="Cellular architecture" href="https://docs.qualcomm.com/doc/80-80023-24/topic/cellular-architecture.html">
    Learn about the key components within cellular architecture.
  </Card>
</CardGroup>

## **ModemManager APIs**

<CardGroup cols={2}>
  <Card title="Establish and release data call" href="https://docs.qualcomm.com/doc/80-80023-24/topic/modem-manager-apis.html">
    Use ModemManager APIs to establish and release data calls.
  </Card>

  <Card title="Perform SMS operations: MO and MT SMS" href="https://docs.qualcomm.com/doc/80-80023-24/topic/modem-manager-apis.html">
    Use ModemManager APIs to perform both mobile-originated and mobile-terminated SMS operations.
  </Card>
</CardGroup>

## **Bring up**

<CardGroup cols={2}>
  <Card title="Bring up the data call service" href="https://docs.qualcomm.com/doc/80-80023-24/topic/bring-up-data-call.html">
    Bring up the data call service using a sample application or the CLI.
  </Card>

  <Card title="Bring up the SMS service" href="https://docs.qualcomm.com/doc/80-80023-24/topic/bring-up-sms.html">
    Bring up the SMS service using a sample application.
  </Card>

  <Card title="Build your application using sample application" href="https://docs.qualcomm.com/doc/80-80023-24/topic/sample-apps-for-cellular.html">
    Use sample applications to build your data call management application.
  </Card>
</CardGroup>

## **Troubleshoot cellular issues**

<CardGroup cols={2}>
  <Card title="Troubleshoot WWAN data call issues" href="https://docs.qualcomm.com/doc/80-80023-24/topic/debug-cellular-issues.html">
    Debug issues related to WWAN data call bring up.
  </Card>

  <Card title="Troubleshoot SMS issues" href="https://docs.qualcomm.com/doc/80-80023-24/topic/debug-cellular-issues.html">
    Debug issues related to SMS bring up.
  </Card>
</CardGroup>