Hi All,
I tried connecting internet using GPRS Connection(Samsung Mobile)using wvdial command. The output of the command "sudo wvdial DATA" (without quotes) on the console was like below in b/w --- line
----------------------------------------------------------------------------
--> WvDial: Internet dialer version 1.61
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,ΓÇ¥IPΓÇ¥,ΓÇ¥airtelgprs.comΓÇ¥
AT+CGDCONT=1,b [1d]IPb [1d],b [1d]airtelgprs.comb [1d]
+CME ERROR: 3
--> Bad init string.
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,ΓÇ¥IPΓÇ¥,ΓÇ¥airtelgprs.comΓÇ¥
AT+CGDCONT=1,b [1d]IPb [1d],b [1d]airtelgprs.comb [1d]
+CME ERROR: 3
--> Bad init string.
--> Cannot get information for serial port.
--> Initializing modem.
--> Sending: ATZ
ATZ
OK
--> Sending: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
OK
--> Sending: AT+CGDCONT=1,ΓÇ¥IPΓÇ¥,ΓÇ¥airtelgprs.comΓÇ¥
AT+CGDCONT=1,b [1d]IPb [1d],b [1d]airtelgprs.comb [1d]
+CME ERROR: 3
--> Bad init string.
--------------------------------------------------------------------------

and the wvdial.conf was like below in bw --- line
--------------------------------------------------------------------------
[Modem0]
Modem = /dev/rfcomm0
Baud = 230400
SetVolume = 0
DialCommand = ATDT
FlowControl = Hardware(CRTSCTS)
[Modem1]
Modem = /dev/ttyACM0
Baud = 230400
SetVolume = 0
DialCommand = ATDT
FlowControl = Hardware(CRTSCTS)
[Dialer GPRS]
Username = 1
Password = 1
Phone = *99***1#
Mode = 1
Inherits = Modem0
[Dialer DATA]
Username =
Password =
Phone = *99***1#
Mode = 1
Inherits = Modem1
[Dialer Defaults]
Modem = /dev/rfcomm0
Baud = 230400
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Init3 = AT+CGDCONT=1,”IP”,”airtelgprs.com”
ISDN = 0
Modem Type = Analog Modem
Area Code =
Phone = *99***1#
Username =
Password =
Ask Password = 0
Dial Command = ATDT
Stupid Mode = 1
Compuserve = 0
Force Address =
Idle Seconds = 3600
DialMessage1 =
DialMessage2 =
ISDN = 0
Auto DNS = 1
-------------------------------------------------------------------------

As a result of some error i am not able to connect to internet.
Can anyone help me in this problem.

Hi Navjot, Please give this file a try. If it does not work try changing the Init3 "internet" by airtelgprs.com, be sure about the modem path.
This file is working for me for almost all carriers, you just need to change few minor things. Good luck.

Modem = /dev/ttyACM0
Baud = 460800
Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2
Init3 = AT+CGDCONT=1,"IP","internet"
Modem Type = Analog Modem
Phone = *99#
Username = www
Password = www
New PPPD = yes
Stupid Mode = on