I find that the maximum volume is far too low even for a normal phone call. I can understand almost nothing. That would be a reason for me not to buy this device again. I have to put everything on loudspeaker all the time to understand anything.

If you do not hear back within a useful time frame, you can also create a discussion in an appropriate product category to increase the reach of your question. You are also welcome to contact our customer service if you suspect a defect: https://helpcenter.digitec.ch/hc...