Visual Studio/WPConnect Unable to Connect to WP7 Device


For some reason, I'm no longer able to connect and deploy to my wp7 device. Zune does not show the phone as being connected, despite the fact that it is connected and the phone shows that it's being charged ... and the wpconnect tool gives the following error:

Failed to connect to the device. Ensure that the device is completely booted and is connected to the PC. (0x80070103)

I rebooted the phone, and I've deployed to it before, so it's definitely developer unlocked. I verified that my computer has internet access. Any other troubleshooting thoughts?

asked on Stack Overflow May 23, 2011 by Joel Martinez

8 Answers


Hey, I run into this all the time. Simply restart your phone and connect again. Make sure you plug in and unplug the phone several times, waiting at least a minute if it doesn't work.

In short, it's temperamental, Keep trying.

answered on Stack Overflow May 23, 2011 by Ben Cull

Make sure that you have switched off WiFi and Bluetooth on your phone.

I have found that I cannot deploy when Wifi and Bluetooth are switched on - even though Zune is syncing music and other content in the usual fashion. The error messages are frustratingly unhelpful!

answered on Stack Overflow Jul 25, 2012 by Gavin

As a short term workaround try using the Application Deployment utility to deploy the xap file.

answered on Stack Overflow May 23, 2011 by Slobo80

I had the same issue. When I changed the Project properties target OS to 7.1 it worked.

answered on Stack Overflow Nov 16, 2011 by kakopappa

I had the same issue. Only restoring to the previous OS version helped me. Also I would that it usually happens when internet sharing is turned on.

answered on Stack Overflow May 29, 2012 by k0stya • edited Jun 7, 2012 by k0stya

I think I finally found the problem!

When I had this problem a few days ago, I had been charging my phone (Lumia 900) using a faulty charger which keeps on getting disconnected. And now that I've changed the cable and charger, it started working again! I had the same problem with my previous phone as well (HTC Mozart), and I had a bad cable back then, but never made the connection (geddit?) between the problem and the cable...

My theory is that when the phone is running on bad power supply/not getting enough power, it sets a flag in the registry, which throws that error.

answered on Stack Overflow Nov 5, 2012 by Jonny Lin

Also, bizarrely I just found that if you have internet sharing turned on then it won't let you connect.

answered on Stack Overflow Feb 13, 2013 by Paul

Any of above mentioned did not work for me. I had many different error messages (included the 0x80070103)

What did is this:

  1. Go to, uregister your phone.
  2. Launch registration tool ("C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v8.0\Tools\Phone Registration\PhoneReg.exe")
  3. Unregister in tool from 2) too (if it is showing still as registered).
  4. Now disconnect phone and connect it again
  5. Register phone in tool from 2)
answered on Stack Overflow Oct 23, 2013 by aerkain

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