> For the complete documentation index, see [llms.txt](https://help.3sigmacrm.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.3sigmacrm.com/common-issues.md).

# Common issues

- [Troubleshooting Call Log Syncing Issues](https://help.3sigmacrm.com/common-issues/troubleshooting-call-log-syncing-issues.md)
- [Changing the Default WhatsApp App for Messaging](https://help.3sigmacrm.com/common-issues/changing-the-default-whatsapp-app-for-messaging.md)
- [Facebook Troubleshooting](https://help.3sigmacrm.com/common-issues/facebook-troubleshooting.md)
- [Delayed Facebook Lead Alerts](https://help.3sigmacrm.com/common-issues/delayed-facebook-lead-alerts.md)