: Visit the official support page for your specific hardware model. For example, Yealink or Gigaset often provide direct links to their mobile management software.
: Ensure both your iPhone and the GM40E base station are on the same Wi-Fi network.
: Go to Settings > Privacy > Contacts and ensure the app has permission to access your phonebook.
: Avoid downloading .ipa files from third-party "IPA download" sites, as these often contain malware or modified code that could compromise your contact data. Troubleshooting Common Issues
: If you have a legitimate .ipa file provided by an IT department: