Enabling to use ZTE MF627 usb modem

Install usb-modeswitch and then wvdial, put these entries to your wvdial.conf;

[Dialer Defaults]
Phone = *99#
Username = type your login username
Password = type your login password
Stupid Mode = 1
Dial Command = ATDT

[Dialer hsdpa]
Modem = /dev/ttyUSB0
Baud = 115200
Init2 = ATZ
Init3 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
ISDN = 0
Modem Type = Analog Modem

Change your phone no. and just guess if your modem is /dev/ttyUSB0 or /dev/ttyUSB1 and so on. Type wvdial hsdpa as root in the terminal and wait a little for the connection.