I hear a hum in the headset of the S10, S11 or S12.
I hear a hum in the headset
Adjust the compatibility slide switch until the sound is clear.
Try other switch settings (It will not harm the headset or your phone).
Try installing on in another location, if the hum is still present you may need to replace the unit
Low incoming Volume You can adjust the "Listen" volume control, on the top of your base. The "Tone" dial on the base will also affect what you hear. If your telephone has a volume control on it, you can also use that to further adjust your speaker volume.
Callers cannot hear my voice There are a few things that may be causing this.