Follow these steps to restore factory settings on your Sony WF-1000XM4 headphones;
1.Put both of the earbuds into the charging case.
2.Touch and hold the sensor on the back of both earbuds at the same time.
3.Hold the sensors for 10 seconds and release 5 seconds after the LED indicator in front of the case flashes red.
6.This step is very important, you must release your finger exactly after 5 seconds of the LED flashing red.
Otherwise, your device will not initialize and reset to factory settings and you will need to repeat the process again.
The LED indicator will flash green 4 times when the initializing process is complete.
7.Now, go to the Bluetooth menu on the device to which your Sony WF-1000XM4 headphones are connected. Delete, un-pair, or forget your headphones from the device.
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