OPPO R9s

Android 6.0.1

I can't make voice calls on my OPPO R9s Android 6.0.1

Cause 4 of 12: Not adequate network coverage

The network coverage may differ from area to area. In certain areas it may so low that it's not possible make calls.

Solution: Try making a call later when you're in an area with better network coverage. View our network coverage map.

Are you ready to upgrade your device? Check out our latest mobile phones