Option to mark wireless connection as mobile to save costs

When on mobile broadband Ubuntu does not check for updates, which is a very good functionality.

However, many people have data contracts on their smart phones and use tethering via WLAN to share the connection. The problem is that my phone appears as a hotspot and thus Ubuntu does not recognize that I am on broadband and uses most of my monthly traffic just to check for updates.

I would strongly recommend a script in the WLAN configuration to mark a connection as mobile.

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: network-manager 0.9.6.0+git201301021750.e78c3e8-0ubuntu3
ProcVersionSignature: Ubuntu 3.8.0-3.7-generic 3.8.0-rc5
Uname: Linux 3.8.0-3-generic x86_64
ApportVersion: 2.8-0ubuntu4
Architecture: amd64
Date: Sat Feb 2 23:35:53 2013
IfupdownConfig:
 auto lo
 iface lo inet loopback
InstallationDate: Installed on 2012-03-31 (308 days ago)
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Beta amd64 (20120331)
IpRoute:
 default via 172.20.10.1 dev wlan0 proto static
 169.254.0.0/16 dev wlan0 scope link metric 1000
 172.20.10.0/28 dev wlan0 proto kernel scope link src 172.20.10.3 metric 9
MarkForUpload: True
NetworkManager.state:
 [main]
 NetworkingEnabled=true
 WirelessEnabled=true
 WWANEnabled=true
 WimaxEnabled=true
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: network-manager
UpgradeStatus: Upgraded to raring on 2013-01-23 (10 days ago)
nmcli-dev:
 DEVICE TYPE STATE DBUS-PATH
 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/1
 eth0 802-3-ethernet unavailable /org/freedesktop/NetworkManager/Devices/0
nmcli-nm:
 RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN
 running 0.9.7.0 connected enabled enabled enabled enabled enabled