To charge the earbuds with your phone, slide down the earbud compartment cover and place the earbuds in their slots. Slide up the cover.
Connect the charger to the phone. If the battery is completely discharged, it may take several minutes before the charging indicator is shown on the phone screen. When the earbuds are charging, the red indicator light on the earbuds is on and goes off once fully charged.
When done, unplug the charger from the phone and then from the wall outlet.
Tip: You can use USB charging when a wall outlet is not available. The efficiency of USB charging power varies significantly and it may take a long time for charging to start and the device to start functioning.