According to Apple’s documentation adding the voip key to the application’s property list, under the “required background modes” would basically guarantee that the app will be launched so that it can negotiate a background connection and handle incoming calls as soon as the device is turned on.
For Android, you would have to create a custom plugin that incorporates the functionality as described in this forum post. For more information on creating Cordova plug-ins and integrating them within Icenium, check out these links:
Regards,
Steve
Telerik
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