@Jean-Baptiste One other question... when this happens, does the indicator show that you're connected to 3G, or does it show a WiFi connection with minimal signal strength ( eg. one bar...which looks like a dot )?
When the device is at the extreme extent of an access point's range, it can get into a situation where data cannot be transfered, yet the phone still appears to be associated with the access point. In my testing, this happens with Android and iOS as well. It's only after the WiFi disconnects that mobile data should take over. -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager in Ubuntu. https://bugs.launchpad.net/bugs/1410113 Title: [krillin] Data connection doesn't switch from Wifi to Cellular Status in the base for Ubuntu mobile products: New Status in network-manager package in Ubuntu: Confirmed Status in network-manager package in Ubuntu RTM: New Bug description: Conditions to reproduce are not clear. *Sometimes* when going out of Wifi range, data doesn't switch to 3G. I waited 45min and the connection never established. When I'm back within Wifi range, the device reconnects to the AP and data is working. I didn't play with airplane mode. ProblemType: Bug DistroRelease: Ubuntu RTM 14.09 Package: network-manager 0.9.8.8-0ubuntu33 Uname: Linux 3.4.67 armv7l ApportVersion: 2.14.7-0ubuntu8 Architecture: armhf CRDA: Error: [Errno 2] No such file or directory: 'iw' Date: Tue Jan 13 09:34:02 2015 IfupdownConfig: # interfaces(5) file used by ifup(8) and ifdown(8) # Include files from /etc/network/interfaces.d: source-directory /etc/network/interfaces.d InstallationDate: Installed on 2015-01-12 (1 days ago) InstallationMedia: Ubuntu Utopic Unicorn (development branch) - armhf (20150112-030205) IpRoute: default via 192.168.1.254 dev wlan0 proto static 192.168.1.0/24 dev wlan0 proto kernel scope link src 192.168.1.16 metric 9 NetworkManager.state: [main] NetworkingEnabled=true WirelessEnabled=true WWANEnabled=true WimaxEnabled=true PciNetwork: SourcePackage: network-manager UpgradeStatus: No upgrade log present (probably fresh install) mtime.conffile..etc.dbus.1.system.d.org.freedesktop.NetworkManager.conf: 2014-12-18T18:05:17 nmcli-dev: DEVICE TYPE STATE DBUS-PATH /ril_0 gsm connected /org/freedesktop/NetworkManager/Devices/2 /ril_1 gsm disconnected /org/freedesktop/NetworkManager/Devices/1 wlan0 802-11-wireless connected /org/freedesktop/NetworkManager/Devices/0 nmcli-nm: RUNNING VERSION STATE NET-ENABLED WIFI-HARDWARE WIFI WWAN-HARDWARE WWAN running 0.9.8.8 connected enabled enabled enabled enabled disabled To manage notifications about this bug go to: https://bugs.launchpad.net/canonical-devices-system-image/+bug/1410113/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp