PdaNet APK is a free app (available for iPhone, Android, BlackBerry, and other mobile platforms) that you can use to turn your smartphone into a modem for your laptop. With this app you can share the internet connection to otherdevice.
PdaNet makes the software that makes Smart Phone-to-laptop tethering kind of easy. Tethering capabilities mean you'll never have to worry about finding a wi-fi hotspot or be in range of a wireless access point as long as you have cellular data coverage (3G/4G), you'll be able to work online on your laptop wherever you are.
read the description of this app from the play store :
PdaNet+ now contains both PdaNet and FoxFi. Turn your Android phone into free WiFi hotspot or USB broadband modem. No rooting. No tether plan needed. With additional improvements, this is a complete tether solution of sharing phone Internet with computers or tablets.
PdaNet+ supports USB, Bluetooth and WiFi. USB mode works for all Android phones. FoxFi/WiFi mode only works on some phones. Please see the supported list at http://pdanet.co/devices
Free edition of PdaNet+ will require you to turn back on after some usage, otherwise it is same as full version.
PdaNet is a free download for Windows systems and Android phones, and doesn't appear to have usage limits or time-outs. If you want to instal this apps from computer, you my install it from play store by hitting this link. You can also install this app manually by downloading the apk file then install it on your mobile device the apk link is on the end of this articles.
Download PdaNet+ APK