Thanks to our mobile devices and data rates we are at all times connected to the Internet. Except coverage problems, we always carry with us an internet connection that sometimes we can be very handy to share other devices can connect to the Internet at any given time.
Since Android 2.2 (Froyo), almost all devices allow us to do tethering, ie, share our data connection so we can have Internet on our laptop or tablet, or to give Internet to the friend who is out of data or coverage .
Tethering and Wi-Fi
Share your Internet connection with other devices is easy. We just have to go to Settings> Wireless & networks> Tethering & Wi-Fi Zone. Now depending on your device options would see USB tethering to share our connection through a Portable Wi-Fi USB cable that would connect to the laptop or computer to create an access point Wi-Fi, and Anchor option Bluetooth, the least used.
The choice of portable Wi-Fi allows you to configure the Wi-Fi area añadirñe a network name, add a password and select security. Must revise the configuration of the Wi-Fi area to watch is protected for anyone without our consent can connect.
Now that we have seen how our device Android can share our data connection let an interesting option available from Android 4.1 (Jelly Bean) for devices to be connected to a Wi-Fi access created by another Android device.
If we connect to a wireless access point that applications can not consume data when in the background so as not to spend so much data rate of the other device. This option is in Settings> Wireless & networks> Using Data Connections. Once in "Using data" we just need to go to the menu and access points to select mobile access to Wi-Fi networks are shared by a mobile device to prevent applications from connecting to the Internet in the background. They could also display a warning if you are downloading large files.