Setting up the Reliance Huawei EC-121 is relatively easy compared to that of its cousin the ZTE 880.

Setting up the Reliance Huawei EC-121 is relatively easy compared to that of its cousin the ZTE 880 and very similar to that of the EC-325.  After you plug in your modem, running dmesg from the command line should show you something similar to that below.

[13834.424042] usb 4-2: new full speed USB device using uhci_hcd and address 6
[13834.604048] hub 4-0:1.0: unable to enumerate USB device on port 2

[13835.580016] usb 4-2: new full speed USB device using uhci_hcd and address 7
[13835.799600] usb 4-2: configuration #1 chosen from 1 choice
[13835.812064] usb-storage: probe of 4-2:1.0 failed with error -5
[13835.812085] option 4-2:1.0: GSM modem (1-port) converter detected
[13835.813641] usb 4-2: GSM modem (1-port) converter now attached to ttyUSB0
[13835.820376] usb-storage: probe of 4-2:1.1 failed with error -5
[13835.820394] option 4-2:1.1: GSM modem (1-port) converter detected
[13835.820495] usb 4-2: GSM modem (1-port) converter now attached to ttyUSB1

It detects it as a GSM modem which is OK.

To configure wvdial, type sudo wvdialconf It should show you that it has detected a modem at the end of the commands output. (If you don’t have wvdial do a sudo apt-get install wvdial -You need to be online to do this)

Next edit /etc/wvdial.conf (sudo nano /etc/wvdial.conf) Make sure that in the line Modem = /dev/ttyUSB0 You replace USB0 with what wvdial detected in your case.

Then, Copy and paste the following lines into your wvdial.conf

Note: If you are copying and pasting, the quotes will get mangled and you will need to delete and renter all the quotes/comma’s

[Dialer Defaults]

Init1 = ATZ
Init2 = ATQ0 V1 E1 S0=0 &C1 &D2 +FCLASS=0
Modem Type = Analog Modem
Phone = #777
Username = 9310xxxxxx
Password = 9310xxxxxx
Baud = 9600
New PPPD = yes
Modem = /dev/ttyUSB0
ISDN = 0
Set Volume = 0
FlowControl = Hardware (CRTSCTS)
Modem = /dev/ttyUSB0
Dial Command = ATDT
Baud = 460800
Stupid Mode = 1

Now replace the 9310xxxxxx in username and password with the Reliance number of your data card.

Now you can connect by opening a terminal and typing in wvdial from the terminal. If you get any permission errors, try sudo wvdial. I haven’t managed to figure this one out yet. On some somputers it works without sudo, on some others, I need to use sudo to connect.

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