Thanks for your reply.
Could you pls do the same process on your bluetooth headset ?
Do not do this on iphone.
If yur bluetooth headset has 3 buttons.
Volume up and volume down and power button at center.
Do this on bluetooth headset only.
1. Turn on bluetooth by pressing power button
2. Press and hold on power button and volume down simultaneously, till you hear 2 long beeps.
In some devices, You will notify led light on bluetooth glow in 2 colours
3. Turn off yur bluetooth
4. Turn on bluetooth
5. Now turn on yur bluetooth in iphone
6. You can now see yur bluetooth headset name in yur iphone list
7. Connect it and enjoy.
In case of any help needed in this regard pls reply back.