STEP 1:

Insert the 3G modem on your PC and “disable” the SIM PIN code.This is usually found under Tools>>Options.

STEP 2:

Insert the 3G modem on your router. 

STEP 3:

In web browser (IE or Firefox) access the menu page of the router (default IP address is http://192.168.1.1)

Username: admin           Password: admin

STEP 4:

Go to Internet Access >> PPPoE  Setup page

In WAN Backup Setup

  1. Select Dial backup Mode: 3G USB Modem

STEP 5:

Select Go to 3G USB Modem Backup Setup

STEP 6:

Enter the following details

  1. PPP Client Mode: Enable
  2. APN Name: telstra.bigpond (Bigpond) and telstra.internet (Telstra)
  3. Click [Apply] button
  4. Enter your PPP username and password (Bigpond) and leave the username and password blank for Telstra.

Click [Ok] button

STEP 7:

Connect the 3.5G HSDPA USB modem to the USB port and wait for the 3G modem to connect.

You can also check your online status in Vigor2110/2710 for the 3G connection status