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Telstra's national wi-fi network will be officially "switched on" this Tuesday. Now dubbed 'Air', the network uses hotspots in shopping centres, cafes, sporting stadiums, train stations and old payphones to deliver the largest Wi-Fi network in the country. Unfortunately, it will only be offered free to Telstra's home broadband customers, with mobile customers charged an access fee of up to $23.


A couple of years back, I visited Tokyo and was struck by the fact that there was a genuine dearth of "free" Wi-Fi options. I recently returned to Japan's capital city to see if things had improved.


Dear Lifehacker, I want to be able to access any website at my school, and proxy servers don't work well, so my idea was having a pocket Wi-Fi. I want to make money from this in the same way as a hotel, controlling who can use it and be able to disconnect people that haven't paid me. I would like to be able to monitor how much data people use and shut them off if they use too much. Is it possible to do this? Thanks, Hotspot Harry


Windows: Most people only have one internet connection at home, but what if you could merge your connection with the free Wi-Fi from the cafe down the street with your phone's 4G connection to create a super-pipe with lots of additional bandwidth? That's what Connectify Dispatch does, perfectly.


Dear LH, I'm planning a trip to the UK and I'm trying to sort out my data options for my phones, iPad and netbook. I know there is no way I'm going to use my own network's roaming so I was looking at TravelSIM or similar but I've just found out that the hire car company I'm using offers a Wi-Fi device for £9 a day with 1GB of data a day.


It doesn't seem to be a widespread issue -- so far I've heard of it happening on Telstra iPhone 4S units, but it may go further -- but it looks like the upgrade to iOS 5 may remove the personal hotspot feature entirely. Here's how to get it back.


Mobile broadband is a traveller’s best friend, but is it better packaged as a hotspot, a dongle, or something else entirely? Gizmodo and Lifehacker debate the issues.


Want to open up your Wi-Fi network to easier access for visitors, block the web's nasty stuff from young eyes, and maybe regain some bandwidth, too? Go ahead and unleash your inner coffee shop owner. With free software and no extra hardware, you can manage content and bandwidth on your home network, or even manage a semi-public "hotspot", without feeling like a despot.