My Device: Huawei, model: E1550, HSDPA USB Stick.
Step 1: Plug in device to your PC, open terminal console.
Step 2: Check CentOS auto detect device as GSM modem by command:
In the Result of dmesg command, you must see some following line:
GSM modem converter now attached to ttyUSB0
GSM modem converter detected
GSM modem converter now attached to ttyUSB1
usbcore: registered new driver option
Step 3: Install wvdial (w v d i a l ) – it’s require libwvstreams on dependency
#yum install wvdial
Step 4: Build configuration file for wvdial and save it to /etc/
Check the result message to make sure it success: “Found a modem on /dev/ttyUSB0 (or 1)” and “Modem configuration written to /etc/wvdial.conf”
Step 5: Edit wvdial.conf file:
Press I to edit this file, uncomment 3 line: Phone, Username, Password by remove “;” begin of lines.
Add a new line after Init command (Init1, Init2…). If you have 2 Init, you must add Init3 in new line (if you have init3 already, you must add Init4….)
Init3 = AT+CGDCONT=1,”IP”,”e-connect”
P/s: e-connect is the APN name of your mobile provider, in this case, I use D-COM sim of Viettel so that I use: e-connect. Mobiphone is: m-wap. Vinaphone is: m3-world, username: mms, password: mms.
Edit account informations
Note: Phone must is *99# (all of country)
Username and password in this case is empty. You must add two symbol ‘ (single quote) after them.
Ok, Press “Esc” key to exit edit mode of vi, Press “:” key, enter “qw” and enter to save file.
Step 6: Connect to the internet with D-COM 3G
Please wait a minute, when you see some IP in your terminal, you are done.
Try open new terminal and ping google dns to make sure you can connect to the internet:
cuongk6t – Nguyen Quoc Cuong.