Check whether the silent mode of iPhone 6s is turned on. If the silent mode is not turned on, press the volume + button on the upper left side of the fuselage to adjust the iPhone 6s ringer volume to the maximum or at least half the volume.

The reason why iPhone6s has no sound:

iPhone6s has turned on silent mode or the ringtone volume is set too low;

iPhone6s has turned on do not disturb mode, and the right caller is just the right one It's in Do Not Disturb mode;

iPhone6s problem, such as a broken speaker.

In most cases, the problem of no sound from incoming calls on iPhone 6s, that is, the ringtone does not ring, can basically be solved by checking whether mute, ringer volume, and do not disturb mode are turned on. If the problem is not solved, there may be a problem with the iPhone 6s itself. For example, the speaker is broken. Users can try playing a piece of music.