How to turn off power saving to receive incoming calls (for Oppo Android phones)

To make sure you receive all incoming calls, you'll have to turn off power saving settings.

1. Under Settings, click on Battery.
2. Switch Power Saving off.
   
   
3. Switch all the EVOX settings off for 'Background Freeze', 'Abnormal Apps Optimization', and 'Doze'.
   Your Energy Saver screen for EVOX should match the screen below when you're done.