How is the treatment of interference?
It is complicated with the generation of interference. It may arouse from the handset itself, the FM receiver, the FM channel, the location, the surrounding environment, or the cellular phone systems operated. The characteristics of radio wave and the signal strength of FM broadcasting station sometimes make the interference happened due to the preset FM channel signal cannot be overwritten completely. If it is then the driver may hear some small buzzwords which is the sound from the channel of original station. Although it is not comfortable to the driver, the noise will not disturb the caller unless it is very loud and noisy. Try to place the handset at a proper position, keep the phone cord away from the power cord, to adjust a proper speaker volume, or to choose a suitable LEVEL position for improvement.