H700 unable to pair up 'service not supported'
The term "service" refers to other types of services supported by bluetooth technology like keyboards, mice, etc. There's a lot more than just headsets now.
I suggest checking the bluetooth options on your phone to see if there is a refresh service or other option....there is one like that on my blackberry that I once had to use to solve a similar issue.
Have you tried disabling bluetooth, rebooting phone, enabling bluetooth, and rebooting phone before pairing?
Also, look to see if there is an encryption on/off option on the phone...this could be causing an echo in either state due to interference...try switching encryption on/off.
Also, check your update options on the phone, you didn't say which kind of phone it is but some can get firmware updates that may be needed for bluetooth to work well.
Finally, you may get results by deleting the device on the phone and re-adding it thru discovery.