Comment 333 for bug 446146

I have huawei EC168C. ( was directed to this post, my bug was marked dublicate)
Its still not working .:-(
But surprisingly works with Gnome-ppp.:-)

If you like any detail i can post.

For starter : syslog shows this:
Dec 8 19:36:48 animesh-laptop modem-manager: (ttyUSB0) opening serial device...
Dec 8 19:36:48 animesh-laptop modem-manager: (ttyUSB2) opening serial device...
Dec 8 19:36:53 animesh-laptop modem-manager: EVDO signal quality: 99
Dec 8 19:36:53 animesh-laptop modem-manager: EVDO signal quality: 99
Dec 8 19:37:49 animesh-laptop NetworkManager: <WARN> stage1_prepare_done(): CDMA modem connection failed: No service
Dec 8 19:37:49 animesh-laptop NetworkManager: <info> (ttyUSB0): device state change: 4 -> 9 (reason 0)
Dec 8 19:37:49 animesh-laptop NetworkManager: <info> Marking connection 'Reliance Netconnect connection' invalid.
Dec 8 19:37:49 animesh-laptop NetworkManager: <info> Activation (ttyUSB0) failed.
Dec 8 19:37:49 animesh-laptop NetworkManager: <info> (ttyUSB0): device state change: 9 -> 3 (reason 0)
Dec 8 19:37:49 animesh-laptop NetworkManager: <info> (ttyUSB0): deactivating device (reason: 0).
Dec 8 19:37:49 animesh-laptop modem-manager: (ttyUSB2) closing serial device...
Dec 8 19:37:49 animesh-laptop modem-manager: (ttyUSB0) closing serial device...

Using Gnome-ppp to connect syslog is:

Dec 8 19:39:32 animesh-laptop pppd[3589]: pppd 2.4.5 started by root, uid 0
Dec 8 19:39:32 animesh-laptop NetworkManager: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Dec 8 19:39:32 animesh-laptop NetworkManager: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Dec 8 19:39:32 animesh-laptop pppd[3589]: Using interface ppp0
Dec 8 19:39:32 animesh-laptop pppd[3589]: Connect: ppp0 <--> /dev/ttyUSB2
Dec 8 19:39:35 animesh-laptop pppd[3589]: PAP authentication succeeded
Dec 8 19:39:38 animesh-laptop pppd[3589]: Cannot determine ethernet address for proxy ARP
Dec 8 19:39:38 animesh-laptop pppd[3589]: local IP address 115.240.85.114
Dec 8 19:39:38 animesh-laptop pppd[3589]: remote IP address 220.224.141.129
Dec 8 19:39:38 animesh-laptop pppd[3589]: primary DNS address 202.138.97.193
Dec 8 19:39:38 animesh-laptop pppd[3589]: secondary DNS address 202.138.96.2

Which kernels i should use and should i upgrade any network manager: