Ask Ubuntu is a question and answer site for Ubuntu users and developers. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

Huawei USB Modem E303 not working after installing JAVA... i installed Xtreme Download Manger and ubuntu installed java... after that modem isn't detected.Tried reinstalling


, but it didn't work

Here’s what dmesg says

[ 2824.231057] usb 3-2: new high-speed USB device number 4 using xhci_hcd
[ 2824.247948] usb 3-2: New USB device found, idVendor=12d1, idProduct=14fe
[ 2824.247956] usb 3-2: New USB device strings: Mfr=2, Product=1, SerialNumber=0
[ 2824.247962] usb 3-2: Product: HUAWEI Mobile
[ 2824.247968] usb 3-2: Manufacturer: HUAWEI
[ 2824.300718] usb-storage 3-2:1.0: USB Mass Storage device detected
[ 2824.300827] scsi7 : usb-storage 3-2:1.0
[ 2824.300946] usb-storage 3-2:1.1: USB Mass Storage device detected
[ 2824.301022] scsi8 : usb-storage 3-2:1.1
[ 2824.301115] usbcore: registered new interface driver usb-storage
[ 2825.300336] scsi 7:0:0:0: CD-ROM            HUAWEI   Mass Storage     2.31 PQ: 0 ANSI: 2
[ 2825.300370] scsi 8:0:0:0: Direct-Access     HUAWEI   SD Storage       2.31 PQ: 0 ANSI: 2
[ 2825.302688] sr1: scsi-1 drive
[ 2825.302959] sr 7:0:0:0: Attached scsi CD-ROM sr1
[ 2825.304495] sr 7:0:0:0: Attached scsi generic sg3 type 5
[ 2825.310547] sd 8:0:0:0: Attached scsi generic sg4 type 0
[ 2825.311925] sd 8:0:0:0: [sdc] Attached SCSI removable disk
[ 2825.451576] ISO 9660 Extensions: Microsoft Joliet Level 1
[ 2825.459956] ISOFS: changing to secondary root
[ 3688.963776] systemd-hostnamed[6133]: Warning: nss-myhostname is not installed. Changing the local hostname might make it unresolveable. Please install nss-myhostname!
share|improve this question
Explain what specifically doesn't work and provide some output and what you've tried to fix it yourself. – passy Dec 25 '13 at 8:36
edited my post on above.please be kind enough to give me a quick response because i'm not a hardcore linux user – Janindu Dec 25 '13 at 9:24
how can I find the connection name...?? this is the terminal result Satellite-L50-A:~$ nmcli nm wwan on && nmcli con up id 'Dialog GSM e Prepaid (Kitbb)' Error: Unknown connection: Dialog GSM Prepaid (Kitbb) – Janindu Dec 25 '13 at 11:32
Open the Network Connection application. There will be your connection names. Above one is just an example. – user224082 Dec 25 '13 at 17:31
visit… , this will solve almost all your problems. – Kanhiya May 4 '14 at 7:51
up vote 1 down vote accepted

All unlocked modems are working with Ubuntu. If you want to unlock:

  1. Download Universal master code program,type in your modem IMEI number and calculate it. Now you have generate codes, which you need write down.

  2. Now download your modem firmware from huawei web site, then launch it. After a few minutes it'll ask for an unlock code, that you generated earlier in step 1. Now type it in and it will unlocked your modem, which then will work with/under Ubuntu.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.