1. Insufficient battery power to the phone or earphone to fully charge the headset.

2. If the distance between the mobile phone or the headset is too far, or there are obstacles that cause the signal to be unstable, there are signal interferences such as WIFI, reset the headset, and fully charge the headset to a place where there is no signal interference. 3, when walking, headphones should be placed on the same side of the phone pocket.