1. Plug your modem into usb port.
2. To make sure if your modem has been detected by your ubuntu, use this command in your terminal.
standy@ubuntu:~$ lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 04f2:b098 Chicony Electronics Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 003: ID 19d2:fff5
Bus 003 Device 002: ID 1bcf:0007 Sunplus Innovation Technology Inc.
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
In here, you can see your modem vendor id and product id. 19d2:fff5 is your modem ID as CDROM storage, not as MODEM. ZTE modem has 2 function, as storage (include Windows Driver) or as modem itself. To use this modem, we must change its mode to the Modem mode with use USB_ModeSwitch – Activating Switchable USB Devices on Linux.
3. After that, we must download that software from here : http://www.draisberghof.de/usb_modeswitch/usb_modeswitch-1.0.7.tar.bz2
After you have that file, you must extract its content by using extraction software (right click that file => extract here). The content of that file is included these files :
80-usb_modeswitch.rules
README
usb_modeswitch.d
COPYING
usb_modeswitch
usb_modeswitch.h
Makefile
usb_modeswitch.c
usb_modeswitch.sh
Makefile.integrated
usb_modeswitch.conf
usb_modeswitch.tcl
by using Nautilus (type “sudo nautilus” in terminal), you must copy these files (red color files only) into :
usb_modeswitch => /usr/sbin
usb_modeswitch.conf => /etc
4. Next you must set or edit usb_modeswitch.conf with gedit.
You must search words line contain like this :
########################################################
# ZTE AC8710
# ZTE AC2726
# and others
#
# Many new ZTE devices use this sequence. There are
# several ID combinations; check your default
#
# Contributor: Michael Khurtsiya, Amit Pundir and others
DefaultVendor= 0×19d2
DefaultProduct= 0xfff5
TargetVendor= 0×19d2
TargetProduct= 0xfffe
# No. 2
;DefaultVendor= 0×19d2
;DefaultProduct= 0xfff6
;TargetVendor= 0×19d2
;TargetProduct= 0xfff1
# No. 3
;DefaultVendor= 0×19d2
;DefaultProduct= 0xfff5
;TargetVendor= 0×19d2
;TargetProduct= 0xfff1
# only for reference and 0.x versions
# MessageEndpoint=0×05
MessageContent=”5553424312345678c00000008000069f030000000000000000000000000000″
———————————————————————
You must set yours to be like that. The difference only in red words line, with delete ; symbol.
Save and exit from gedit.
5. Now on terminal you can type :
standy@ubuntu:~$ sudo usb_modeswitch
Looking for target devices …
No devices in target mode or class found
Looking for default devices …
Found default devices (1)
Accessing device 003 on bus 003 …
Using endpoints 0×05 (out) and 0×82 (in)
Inquiring device details; driver will be detached …
Looking for active driver …
No driver found. Either detached before or never attached
SCSI inquiry data (for identification)
————————-
Vendor String: ZTE
Model String: USB Storage FFFE
Revision String: 2.31
————————-
USB description data (for identification)
————————-
Manufacturer: ZTE, Incorporated
Product: USB Storage
Serial No.: 000000000002
————————-
Setting up communication with interface 0 …
Trying to send the message to endpoint 0×05 …
OK, message successfully sent
Device is gone, skipping any further commands
-> Run lsusb to note any changes. Bye.
standy@ubuntu:~$ lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 004: ID 04f2:b098 Chicony Electronics Co., Ltd
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 003 Device 004: ID 19d2:fffe
Bus 003 Device 002: ID 1bcf:0007 Sunplus Innovation Technology Inc.
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
6. Oke … your modem is a modem now … or in modem mode … In here, you can see your modem vendor id and product id. 19d2:fffe is your modem ID as MODEM.
Next, you must modprobe your modem as usbserial into kernel … (different method with other ubuntu version) with “sudo gedit /boot/grub/menu.lst” in terminal.
Compare, add and edit yours to be like this :
## ## End Default Options ##
title Ubuntu 9.04, kernel 2.6.28-11-generic with usbserial
root ()/ubuntu/disks
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=EA9CAC679CAC304D loop=/ubuntu/disks/root.disk ro quiet splash
usbserial.vendor=0×19d2 usbserial.product=0xfffe
initrd /boot/initrd.img-2.6.28-11-generic
title Ubuntu 9.04, kernel 2.6.28-11-generic (recovery mode)
root ()/ubuntu/disks
kernel /boot/vmlinuz-2.6.28-11-generic root=UUID=EA9CAC679CAC304D loop=/ubuntu/disks/root.disk ro single
initrd /boot/initrd.img-2.6.28-11-generic
title Ubuntu 9.04, memtest86+
root ()/ubuntu/disks
kernel /boot/memtest86+.bin
———————————————————————
Save and restart now …
7. Now after reboot system … you must check once more with “lsusb” command to ensure if your modem in the modem mode … if not use “sudo usb_modeswitch” again and check again if already in modem mode (19d2:fffe) …
if you have … already success, its time to make a connection … with pppconfig.
Close all terminal. Open new terminal and type
sudo pppconfig
in the new (below) window select Create and give ok…
Type provider name (say reliance) and give ok
Select Dynamic and give ok
Select PAP and give ok
Enter your Reliance Number and give ok
Password is same as your Reliance Number, enter it and give ok
Do not change Modem Speed
Select Tone and give ok
Enter #777 and give ok
Enter yes
Select Manual and give ok
Give your modem port. In my (most of the) case it is /dev/ttyUSB0
Now all set. Ensure Everything is fine. Select Finished then ok
Finally in the last wind select Quit and give ok
Now you have configured your modem successfully and all set to connect.
To establish internet connection type the following command in terminal…
sudo pon reliance
Ensuring connection is established use this command…
ifconfig
Now you should see entry like this…
ppp0 Link encap:Point-to-Point Protocol
inet addr:123.239.41.80 P-t-P:220.224.134.12 Mask:255.255.255.255
UP POINTOPOINT RUNNING NOARP MULTICAST MTU:1500 Metric:1
RX packets:3429 errors:23 dropped:0 overruns:0 frame:0
TX packets:3683 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:3
RX bytes:2309338 (2.3 MB) TX bytes:731534 (731.5 KB)
Once the connection is established you can close the terminal.
To disconnect…
sudo poff reliance
Extra
In case if you want to monitor internet speed then install pppstatus package (sudo apt-get install pppstatus) and type sudo pppstatus in the terminal.
That’s all I have to do get Internet running on my laptop.
I think … this tutorial is the first that describe installation of ZTE Modem MG880 in Ubuntu Jaunty 9.04 with complete guide => 100% tested and debugged …
And last, sorry for my bad english … I hope you can understand … 
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