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.

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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:

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

AT&T:

https://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