In new version of "NetworkManager" , Came many new features, most came to support additional network
Version 0.80.1 added support for ModemManager, so as to increase support for Mobile Broadband cards such as GSM, UMTS and CDMA.
Use ModemManager means new features, such as displaying signal strength, feature to switch between networks 3g and 2g, and now you can prevent roaming communication to reduce cost of communications.
0.81.0 also supports use of Bluetooth to get in touch Protocol (PAN) and (DUN).
Here a wiki for devices supported.
If you are from users who connect by IPv6 will be happy when you know that ModemManager now supports IPv6 ip automatically and consistently.
And also in this version will be supported by DHCP.