I am using a Dell Laptop with embedded mobile broadband chipset on Windows 7. During install it goes all the way and then it starts to roll back.

A new compatible connection manager for the 5520, 5510 & 5505 devices for Windows 7 has been published/released and is available at the following location:-

Vodafone:

http://support.us.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R212089&formatcnt=1&libid=0&fileid=298900

AT&T:

http://support.us.dell.com/support/downloads/download.aspx?c=us&l=en&s=gen&releaseid=R212469&formatcnt=1&libid=0&fileid=299579

Thanks,

Ashish Jain