In case of emergency there is no Wi-Fi network, your computer can still connect to the Internet via the 3G network sharing on mobile phones or tablets (Tethering).
Functions share the 3G/4G connection (Tethering) on a mobile phone is not new and dedicated to Android. Other mobile platforms like iOS and Windows Phone are built-in functions. When enabled, the mobile phone will become the center of broadcasting Wi-Fi (hotspot), shared 3G network connection to other devices such as computers connected to use.
You can also use the USB cable connected PC and mobile phone to share a network connection, but in many cases of urgency, the plan will be more convenient.
Android tethering built in, but you can read the applications from Google Quick Play to enable this functionality on your Android smartphone or tablet. Although well integrated Tethering in iOS, but Apple does not license applications (app) support tethering available on the App Store.
One of the most simple and free solution to make Android mobile device into a Wi-Fi base station. You only need to perform an operation touch to activate.
FoxFi support separate Wi-Fi network settings quickly, with the network name and password to log onto the network, with WPA-PSK security mode. Point defects present of FoxFi is only compatible with Android 2.2 - Android 4.0 (ICS), not Jelly Bean friendly (Android 4.1).
Not a free app but Extended Controls worthy hook purse $ 0.99 (about 21,000) to buy from Google Play. Not only on / off fast Wi-Fi hotspot interface right on the home screen (homescreen), but also to customize the widget, help set up the device functions.
When you want to share a network connection between mobile devices and PC via USB cable, EasyTether will simplify the installation operation. You need to install EasyTether on mobile devices and a driver for your computer (Windows / Mac) for both "understand and recognize each other."
However, the free version of EasyTether restrictions when users want to access websites that require secure HTTPS connection tools, instant messaging (IM). Users need to spend 10 dollars to buy the perfect to overcome these limitations.