Huawei E3131S-2 on Ubuntu 12.04 with wvdial
It works out of the box with a plain wvdial after a small adjustment (need to erase the +FCLASS=0 part). It is detected as the following device (after the automatic mode switch): ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard For the record, I paste the wvdial.conf configured for T-Mobile in Hungary: [Dialer Defaults] Init1 = ATZ Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0 Init3 = AT+CGDCONT=1,"IP","internet" Modem = /dev/ttyUSB0 Username = wap Password = wap Modem Type = Analog Modem Baud = 9600 New PPPD = yes ISDN = 0 Phone = *99# Stupid Mode = 1 Most of the settings are not crucial, but some of them depend on your carrier, like "Init3", "Username" and "Password", while "Modem" depends on your device.