Hi, thanks so much, the modem works! But i have actually two problems: 1-How can i disconnect? I write this in the terminal to connect: sudo wvdial and then i get these info: rockyrock@rockyrock-desktop:~$ sudo wvdial [sudo] password for rockyrock: --> 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: ATDT198888 --> Waiting for carrier. ATDT198888 CONNECT 45333 --> Carrier detected. Starting PPP immediately. --> Starting pppd at Fri Aug 15 14:42:54 2008 --> Pid of pppd: 5518 --> Using interface ppp0 "And some ips here....." Then when i want to disconnet, i just press Ctrl+C to exit. But the problem is that i can't reconnect again!!!! When i try again i get a message says this: --> WvDial: Internet dialer version 1.60 --> Cannot get information for serial port. --> Initializing modem. --> Sending: ATZ --> Sending: ATQ0 --> Re-Sending: ATZ --> Modem not responding. so i reboot and reconnect and it works again! So what should i do about this? How can i disconnect? 2-My other problem is that the internet is too slow "especially in browsing"! When i use the internet in Windows XP it's much faster. But the first time i connected in Ubuntu it worked as fast as in WinXP. I think that there is something in ubuntu that uses the internet and i don't know about it, which makes the internet slow. What do i have to do?? Thanks. -~-~-~-~-THIS IS MY WVDIAL CONFIG FILE-~-~-~-~-~-~-~-~-~- [Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Modem Type = Analog Modem Baud = 115200 New PPPD = yes Modem = /dev/ttySL0 ISDN = 0 Auto DNS = yes Stupid Mode = yes Phone = 198888 Password = ******** Username = ******** Carrier check = no