any another way,,,,,the browser still not connected..... primary DNS address 124.195.15.98 pppd: ??8[08]??8[08] secondary DNS address 114.5.5.5 pppd: ??8[08]??8[08] $ sudo gedit /etc/resolv.conf nameserver 124.195.15.98 i make this file nameserver 114.5.5.5 $ sudo cp /etc/wvdial/resolv.conf /etc/resolv.conf this way, not work, no such file i think the modem still unknown,,,,,, riady@riady-laptop:~$ dmesg|tail [ 3499.896193] usb 2-2: new full speed USB device using uhci_hcd and address 5 [ 3500.120253] hub 2-0:1.0: unable to enumerate USB device on port 2 [ 3501.176170] usb 2-2: new full speed USB device using uhci_hcd and address 6 [ 3501.397454] usb 2-2: configuration #1 chosen from 1 choice [ 3501.401139] usb-storage: probe of 2-2:1.0 failed with error -5 [ 3501.401164] option 2-2:1.0: GSM modem (1-port) converter detected [ 3501.401322] usb 2-2: GSM modem (1-port) converter now attached to ttyUSB0 [ 3501.404615] usb-storage: probe of 2-2:1.1 failed with error -5 [ 3501.404632] option 2-2:1.1: GSM modem (1-port) converter detected [ 3501.412057] usb 2-2: GSM modem (1-port) converter now attached to ttyUSB1 or i must reinstall the os.....