One characteristic which distinguishes smartphones from traditional mobile phones is the extent of their Internet browsing capabilities. Carriers typically sell smartphones alongside service plans which include Internet access through their mobile networks. Several of these devices, such as Apple's iPhone, also include wireless adapters to access the Internet when the mobile Internet network is too slow, unavailable or a faster wireless network is available nearby. Browsing the Internet using a wireless connection -- rather than your phone's built-in Internet -- involves switching on this adapter.
Get in range of an available wireless network, such as at a coffee shop, library or university. Obtain a username and password from the network administrator if the network is protected.
Switch on your phone's wireless adapter. The specific mechanism you use to do this varies, depending on your device, but always involves accessing your phone's "Settings" menu and locating the "Internet" or "Wi-Fi" option. Click on the appropriate option, then toggle it "On" to activate your wireless adapter.
Click the name of the network that you want to connect. Enter your credentials -- if the network requires them -- and wait for the connection to be established. Begin surfing the Internet on your mobile device.