Oppo
Flash Alert for Incoming Calls auf Oppo
On Oppo phones, an incoming call normally relies on ringtone and vibration alone. If your phone lies face-down, sits in another room, or you work in a loud environment, both can go unnoticed.
Coloros solves this with a visual alert: the camera flash blinks in sync with the ringtone whenever a call comes in, even while the screen is off or the device is locked. This works independent of ringtone volume, so it also helps in silent mode.
The toggle lives inside the calling accounts area, not the general notification settings, which is why many users never find it:
Phone ➔ Open the Menu ➔ Tap on Settings ➔ Tap on Calling accounts ➔ Enable or disable Flash on call
Switch it on if you regularly miss calls in noisy or dark settings. Switch it off again if the flashing feels distracting at night or if you notice it shortens battery life on standby, since the flash module briefly activates with every ring.
If your priority is silent notifications rather than visual ones, a vibration pattern is usually the better fix instead of the flash.