Credit: http://withwindows.com WindowBreak project is designed to give you free Windows Phone jailbreak. It is basically a free Interop unlock for Samsung device owners. More OEMs will be added later.

1. By: Windows Phone Homebrew
Blog
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2. WindowBreak is a new project by a
WindowsPhoneHacker team, which is also
known for their previous feats like Theme
for WP7 and Folder for Windows Phone.
The brain behind first ever Interop based
Windows Phone unlock/jailbreak has
successfully implemented this hack on
Samsung WP devices.

3. Unlike, chevronWP7 developer unlock this
will not cost you a dime. This is a free
project similar to iOS jailbreak projects.
ChevronWP7 requires you to purchase a
separate token for each device you wish to
unlock, and the token costs you $9.
However, the process of jailbreaking
Windows Phone using chevronWP7 has
never been that smooth.

4. Users have been complaining about the
issues like, ‘Phone Ignoring Us’ ever since
the tool has been released publicly.
We tried to cover each and every errors in
the past with possible solution. If you’re
facing such issues then feel free to follow
our chevronWP7 unlock errors and
solution guide.

5. Aside from those few errors, chevronWP7
works very well on Windows Phone
device. But why pay for something which
you can get it for free. After all, this is what
we called a freedom. We never exepected
Microsoft, Apple or other manufacturer to
tie our hands by restricting our access to
firmware.

6.  WindowBreak project brings Interop unlock
on the top of developer unlock. This means
that the application with Interop library access
will work on your device.
 Mind you, Interop unlock is not a full unlock.
Full unlock is present via Custom ROM,
which gives you full access to your firmware
(this is topic, we will cover later)

8. Jaxbot was anxiously waiting to unveil his
project ‘WindowBreak’, and today is the
day when he officially announced it on
XDA forum and twitter. As the name
suggest this is a first ever free Windows
Phone jailbreak method that will let you
jailbreak Samsung devices for free.

9. Windows Phone Jailbreak works for
Samsung devices only, as of writing this
article. All you need to do is to open up
this website on your Samsung Windows
Phone and press ‘WindowsBreak Me-
>’ button. This sounds similar to
JailbreakMe, a browser based exploit that
uploads the PDF file on iOS device and
jailbreaks it.

10. Unfortunately, Nokia and HTC owners
would have to wait before getting their
hands on this tool. Both devices block
registry entries in provisioning files, making
it difficult to get hands on Interop entries.
This puts chevronWP7 out of equation for
Samsung users. You do not need to spend
$9 to buy tokens.

12. Credit: http://withwindows.com