I bought a Lumia 630 dual SIM recently and has been trying to register my phone for development, but kept getting this error "Unable to connect to a phone. Make sure the Windows Phone IP over USB transport service is running".
What i use to register my phone is Windows Phone Developer Registration(8.1), and the method i have tried:
Restart IpOverUsbSvc service.
Restart phone, and turn off Set Automatic in date+time.
Any help on this will be highly appreciate as I have already spent 2-3 days trying to connect the phone.
Thank you.
Unplug the USB cable and try a different port, try also a different USB cable, and restarting the Windows Phone IP Over USB Transport service...
Take a look at this thread....
Hope it helps