Comment 8 for bug 599569

The proposed kernel seems to work for 3g...

morrowc@tweezer:~$ uname -a
Linux tweezer 2.6.32-25-generic #44-Ubuntu SMP Fri Sep 17 20:05:27 UTC 2010 x86_64 GNU/Linux

ppp0 Link encap:Point-to-Point Protocol
          inet addr:184.200.99.249 P-t-P:68.28.121.69 Mask:255.255.255.255
          UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1

Sep 22 00:25:03 tweezer kernel: [ 114.532685] usb 2-1: new high speed USB device using ehci_hcd and address 2
Sep 22 00:25:03 tweezer kernel: [ 114.680663] usb 2-1: configuration #1 chosen from 1 choice
Sep 22 00:25:03 tweezer kernel: [ 114.681622] hub 2-1:1.0: USB hub found
Sep 22 00:25:03 tweezer kernel: [ 114.681683] hub 2-1:1.0: 2 ports detected
Sep 22 00:25:05 tweezer kernel: [ 116.560604] hub 2-1:1.0: unable to enumerate USB device on port 2
Sep 22 00:25:06 tweezer kernel: [ 117.380235] usb 2-1.2: new full speed USB device using ehci_hcd and address 4
Sep 22 00:25:06 tweezer kernel: [ 117.492046] usb 2-1.2: configuration #1 chosen from 1 choice
Sep 22 00:25:06 tweezer kernel: [ 117.522448] usbcore: registered new interface driver usbserial
Sep 22 00:25:06 tweezer kernel: [ 117.523078] USB Serial support registered for generic
Sep 22 00:25:06 tweezer kernel: [ 117.523244] usbcore: registered new interface driver usbserial_generic
Sep 22 00:25:06 tweezer kernel: [ 117.523249] usbserial: USB Serial Driver core
Sep 22 00:25:06 tweezer kernel: [ 117.531464] USB Serial support registered for Sierra USB modem
Sep 22 00:25:06 tweezer kernel: [ 117.531606] sierra 2-1.2:1.0: Sierra USB modem converter detected
Sep 22 00:25:06 tweezer kernel: [ 117.532833] usb 2-1.2: Sierra USB modem converter now attached to ttyUSB0
Sep 22 00:25:06 tweezer kernel: [ 117.533060] usb 2-1.2: Sierra USB modem converter now attached to ttyUSB1
Sep 22 00:25:06 tweezer kernel: [ 117.533232] usb 2-1.2: Sierra USB modem converter now attached to ttyUSB2
Sep 22 00:25:06 tweezer kernel: [ 117.533334] usb 2-1.2: Sierra USB modem converter now attached to ttyUSB3
Sep 22 00:25:06 tweezer kernel: [ 117.533370] usbcore: registered new interface driver sierra
Sep 22 00:25:06 tweezer kernel: [ 117.533375] sierra: v.1.3.8:USB Driver for Sierra Wireless USB modems
Sep 22 00:25:07 tweezer kernel: [ 118.920235] usb 2-1.1: new high speed USB device using ehci_hcd and address 5
Sep 22 00:25:07 tweezer kernel: [ 119.031157] usb 2-1.1: configuration #1 chosen from 1 choice
Sep 22 00:25:29 tweezer kernel: [ 140.714824] PPP BSD Compression module registered
Sep 22 00:25:29 tweezer kernel: [ 140.719344] PPP Deflate Compression module registered

I don't know if this does 4g, there's no config-bits I can see to make that appear (or apparent)