Android Smartphone user FAQ: Why am I unable to receive free information and free phone calls from friends?
Answer: this is because the icircall is not running on your mobile.
Solution one: Set icircall to run automatically at startup of your mobile (the setting is in you mobile security software)
Solution two: click to run icircall manually every time after your mobile turning on
If you have done the above steps, icircall is still shut down sometimes, you should check the security software on your mobile phone, be sure to set icircall into the white list of your mobile security software to ensure that the icircall is running always.