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Please see this post
http://ubuntuforums.org/showpost.php?p=9842328&postcount=11
I think the wifi connection will work if you unplug your ethernet cable.

sudo pppoeconf is required only if your modem is in bridge mode.Are you using a dialler in windows?
Please open a terminal and post the result of
sudo lshw -C networkwhen the modem is connected...

Most of the Huawei data cards are supported by mobile partner.Have you tried that?

I think the problem is with your wireless card.From your post#4 you have an Atheros AR2413 card.You may search for solved posts regarding this device. Here is a similar case in Natty (Ubuntu...

Is it a wired connection or wireless?
Please post the result of sudo lshw -C network in ubuntu

Did you try this ?
Can you post the result of
sudo lshw -C network
What result do you get for the command
ipconfig /all in WINDOWS when connection is working

4.2.2.1 is an open DNS server.You will get reply only if you are connected.
Please run
sudo gedit /etc/network/interfaces
Edit the file so that it reads only the following lines(you may backup...

Please run
sudo pon dsl-provider and then
ping 4.2.2.1 -c3(Pl post results)

Please connect from windows and post the result of
ipconfig /all
Also post the output of the following terminal commands from ubuntu
ifconfig -aand
iwconfig
Did you try to configure the...

Try sakis3g if network manager doesnt help
http://micromax-mmx-310g.blogspot.com/
What do you get for the following commands?
lsusb
dmesg | grep tty

Pl see postcount #3 here

Means your modem is OK.
Sorry to say I am helpless.

The results look OK .
Please run
sudo dhclient eth0and post the result.Also see if you can browse.
Can you try a live CD and see if the connection is working?
Do you have windows installed?Is...

Pl post results of
sudo lshw -C networkand
cat /etc/network/interfaces

Please post the results of
route -n
ping 192.168.1.1 -c3and
ping 8.8.8.8 -c3

Pl follow step-1 and 2 here

Please backup /etc/ppp/peers/dsl-provider using
sudo cp /etc/ppp/peers/dsl-provider /etc/ppp/peers/dsl
Proceed with
sudo pppoeconf wlan0
Then connect using
sudo pon dsl-providerand disconnect...

Have you tried
sudo pppoeconf wlan0(Assuming that your wireless device is detected as wlan0)
Can you post the result of
sudo lshw -C network

Can you tell us how your friend is connecting to internet?If he is using PPPoE dialler,you may try this.
Create a connection using
sudo pppoeconf wlan0(assuming your wireless device is detected as...

I use Huawei e173 with BSNL 3G SIM.You may install mobile partner for linux

I have an E173 and I use this to connect.

Is it an HSDPA device ? I have a Huawei E173 device and I use this to connect.
Can you post the output of
lsusband
dmesg| grep tty

If your modem is in bridge mode try
http://ubuntuforums.org/showpost.php?p=9611450&postcount=2
If you have any difficulty please post the output of the following terminal command
sudo lshw -C...

http://ubuntuforums.org/showpost.php?p=9611450&postcount=2

Pl run and post the output of
sudo lshw -C network