The reason I purchased this device was I'm planning to move from ADSL to 4G for internet access and this device gives me the ability to have a Wi-Fi hotspot in the home and also take my larger internet plan with me.
A word of warning. BigW had a couple of these units and the SIM card had expired in 2016. That means the 4GB of data which lasts for 14 days wasn't available. They tried to sell me an additional $2 SIM card with no data. I suggested that perhaps they should simply drop $5-$10 off the price. They took $5 off the price. For $15 that was an excellent price for a 4G W-Fi/USB dongle.
The next surprise is I currently have a SIM card with 14GB of data I using for test. It uses the Vodafone network. I decided to see if I could unlock the device since it expired so long ago, but Optus required a mobile number, and since it hadn't been activated I didn't have a number. But that's where I received a very pleasant surprise. The device wasn't locked. It worked immediately. I was planning and still may use it with the Optus network, so being unlocked wasn't necessary, but it was great that it was.
If anyone is looking for a 4G Wi-Fi USB device the E8372 works well and at $20, it's a very good price. If you're lucky enough that the unit is unlocked, even better.
Kelvin Eldridge
www.OnlineConnections.com.au