To receive incoming calls or message notifications on JusTalk, please allow JusTalk to run automatically in your phone. When your JusTalk is running in the background, the following settings will not affect your device, which means it will not consume more battery or mobile data of your device.
How to configure your notifications:
Step:
Navigate to your JusTalk’s Settings > Notifications > Messages, Incoming calls, Ongoing calls > Turn on Allow notifications