thank, for your help..... it's connected... the trouble was solved..... in any different case i was found Init1 and Init2 with different script Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 first step, i run sudo wvdialconf , automatically write in wvdial.conf....... then edit wvdial.conf,,,, then sudo wvdial starone this is for detail==> riady@riady-laptop:~$ sudo wvdialconf Editing `/etc/wvdial.conf'. Scanning your serial ports for a modem. Modem Port Scan<*1>: S0 S1 S2 S3 WvModem<*1>: Cannot get information for serial port. ttyUSB0<*1>: ATQ0 V1 E1 -- OK ttyUSB0<*1>: ATQ0 V1 E1 Z -- OK ttyUSB0<*1>: ATQ0 V1 E1 S0=0 -- OK ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 -- OK ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 -- OK ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK ttyUSB0<*1>: Modem Identifier: ATI -- ERROR ttyUSB0<*1>: Speed 9600: AT -- OK ttyUSB0<*1>: Max speed is 9600; that should be safe. ttyUSB0<*1>: ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 -- OK WvModem<*1>: Cannot get information for serial port. ttyUSB1<*1>: ATQ0 V1 E1 -- failed with 2400 baud, next try: 9600 baud ttyUSB1<*1>: ATQ0 V1 E1 -- failed with 9600 baud, next try: 9600 baud ttyUSB1<*1>: ATQ0 V1 E1 -- and failed too at 115200, giving up. Found a modem on /dev/ttyUSB0. Modem configuration written to /etc/wvdial.conf. ttyUSB0<Info>: Speed 9600; init "ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0" riady@riady-laptop:~$ sudo gedit /etc/wvdial.conf riady@riady-laptop:~$ clear riady@riady-laptop:~$ sudo wvdial starone --> WvDial: Internet dialer version 1.60 --> 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 --> Modem initialized. --> Sending: ATDT#777 --> Waiting for carrier. ATDT#777 CONNECT 230400 --> Carrier detected. Starting PPP immediately. --> Starting pppd at Thu Apr 8 15:49:38 2010 --> Pid of pppd: 4708 --> Using interface ppp0 --> pppd: `�s[08]x�s[08] --> pppd: `�s[08]x�s[08] --> pppd: `�s[08]x�s[08] --> pppd: `�s[08]x�s[08] --> pppd: `�s[08]x�s[08] --> pppd: `�s[08]x�s[08] --> local IP address 10.245.147.206 --> pppd: `�s[08]x�s[08] --> remote IP address 10.64.64.64 --> pppd: `�s[08]x�s[08] --> primary DNS address 124.195.15.98 --> pppd: `�s[08]x�s[08] --> secondary DNS address 114.5.5.5 --> pppd: `�s[08]x�s[08] thank's.......see u next time