About how to answer calls with earphones and other operations?
You need to double click on the earphone side with charge contact pins to answer calls after pairing with the phone. All the operations(volume+/-, play forward/back, and so on) are on this side of the earphone.
Before pairing with the phone, double-tap on the earphone before connecting to change the English language.
After pairing with phone, single-tap on the right earphone to increase volume. Single-tap on the left earphone to reduce volume. The sound can be loud after you adjust the volume.
