Many of my clients are getting the newer E series Dell Latitudes. The laptops seems pretty decent but they all come with the Dell ControlPoint software. The ControlPoint software aims to centralize the management of the systems settings.
While I am unfamiliar with the overall usefulness of the ControlPoint software, I do know that the ControlPoint Connection Manager is terrible. Just about every end user that I have worked with on these newer laptops asks me to uninstall ControlPoint.
Generally speaking, all that you need to do to get a decent running system is to uninstall the Connection Manager portion of ControlPoint. Just open up Add/Remove Programs and uninstall Connection Manager. After the uninstall and reboot you will notice that the WWAN card will no longer work as you no longer have an app to control the device. The link below is the for 5720 model of WWAN cards which are very common in these Dell systems. The download installs the Sprint Mobile Broadband utility.