Sideload Windows Phone

1. Create your AppHub account here – http://create.msdn.com. Registration walk through is here.

2. Unlock your phone – using PhoneReg.exe (usually) located here – “C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.0\Tools\Phone Registration\PhoneReg.exe”

wp-Start-WPDevTools

wp-dev-phone-registration

3. Sideload xap into your phone. Use XapDeploy.exe (usually) located here – “C:\Program Files (x86)\Microsoft SDKs\Windows Phone\v7.0\Tools\XAP Deployment\XapDeploy.exe”

wp-app-deployment

You can also deploy straight from Visual Studio to Windows Phone Device. Connect your phone to your computer.
Make sure Visual Studio deployment target is “Windows Phone 7 Device” :

wp-device-target

From Toolbar, select Build, Deploy Solution.