How do I connect my Sony Bluetooth headphones to my iPhone?
If you’re using an iPhone, here’s how you can connect it with your Sony Bluetooth headphones or earbuds. Turn on your Bluetooth headphones by holding down the power button for a few seconds until you see the indicator flashing and hear a voice guide saying “Power on”. Unlock your iPhone screen.
How to fix Sony headphones not connecting to iPhone?
Ensure your Sony headphone and iPhone are within a range of 1 meter close to enable easy Connectivity. You can pair your Sony headphones to eight devices. However, it cannot be working on different devices simultaneously. Hence, always check to see that the headphone isn’t connected to another device when connecting with your iPhone.
How do I connect the wh-1000xm3 Bluetooth headset to an iPhone?
Select [Settings]. Touch [Bluetooth]. Touch  to change it to  (turn on the Bluetooth function). Touch [WH-1000XM3]. If passkey (*) input is required on the display of the iPhone, input “0000.”. The headset and iPhone are paired and connected with each other. You will hear a voice guidance “Bluetooth connected”.
How to pair Sony headphones with each other?
To put your Sony headphones in pairing mode, just press and hold the power button for a few seconds. You’ll know it’s in pairing mode when you can see the indicator blinking red and blue.