Hello and welcome to Apple Support Communities, SwapnilPro!
I understand the Bluetooth option on your iPhone has been greyed out. I can understand how this may be concerning, especially if you use Bluetooth frequently. I'd be happy to provide information that may help you out.
Thank you for using Apple Support Communities.
Have a great day!
I understand the Bluetooth option on your iPhone has been greyed out. I can understand how this may be concerning, especially if you use Bluetooth frequently. I'd be happy to provide information that may help you out.
Have a look at this article: If you can't connect a Bluetooth accessory to your iPhone, iPad, or iPod touch
The quoted snippet seems to apply more to this situation.If you still can't pair or connect your Bluetooth accessory
- If you previously connected your Bluetooth accessory to your iOS device, unpair the accessory, put it back in discovery mode, then try to pair and connect it again.
- If you can pair your accessory with some devices but not your iOS device, unpair the accessory from your other devices. Then try to pair with your iOS device again.
- Check with the accessory manufacturer to make sure that your accessory supports your iOS device.
- If you still have any of these issues, contact Apple Support:
- You can’t turn on Bluetooth or the setting is grayed out.
- You can’t connect any Bluetooth accessories with your device.
- The accessory manufacturer confirmed that your accessory is working correctly.
Thank you for using Apple Support Communities.
Have a great day!