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I have connected the dongle to my laptop, it shows in network manager with my network provider name (tata docom), but can't connect to internet.

How can I fix this?

Writing in terminal lsusb command gives following output

Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 003: ID 19d2:0143 ZTE WCDMA Technologies MSM 

here ZTE wcdma is my dongle device

Device: usb0 -----------------------------------------------------------------

Type: Mobile Broadband (GSM)

Driver: cdc_acm

State: disconnected

Default: no

Capabilities:

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Welcome to AskUbuntu! Do you know the brand and model of your dongle? Please edit your question to include that information. Also, look for Q&A in this site for your specific model. –  carnendil Aug 20 '13 at 19:31
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Please edit your question and include the output of the following commands in the terminal: nm-tool, ping -c4 4.2.2.2. –  Braiam Aug 20 '13 at 19:31
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2 Answers 2

You can try with installing

V-Mobile-Broadband

It is the Vodafone Mobile Broadband Driver with GUI

You can install it with ppa:crass/v-mobile-broadband Repository

sudo add-apt-repository ppa:crass/v-mobile-broadband

sudo apt-get update 

sudo apt-get install v-mobile-broadband
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I have put up an answer here:

ubuntu 13.04 recognizes usb mobile broadband modem as ethernet connection

Just change the vendor and product id appropriately as per your requirements.

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