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iPhone Wi-Fi Tips
Oftentimes when you enter an area with a strong Wi-Fi connection in it, such as a hotel or university, you will see that internet connection immediately over power your iPhone's 3G network connection. You will then not have the ability to just connect to the internet through different applications just with the 3G network. You will then have to connect to that said network, and the username and password may be required before you can actually go online. If you have that username and password, it is fairly easy to connect to the Wi-Fi option on your iPhone.
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Connecting to a Secure Wi-Fi Network
Once you notice that you need to connect to the Wi-Fi network instead of the normal iPhone 3G network you need to start by selecting Settings. The very top will have connection spots and go to the second one, which is Wi-Fi. Assuming that your iPhone's Wi-Fi is already selected as ON, go ahead and find the appropriate network for the area. Once you do find the secured Wi-Fi network you are trying to connect to it will prompt you to enter a username and password. If you have this then enter it and you will automatically be able to connect to the Wi-Fi network. This will usually work so that you do not have to enter the username and password each time, but you may notice that upon re-entry to the Wi-Fi area you may have to enter it again.
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Shutting Off Wi-Fi and Using the iPhone's 3G Network
If you do not have the Wi-Fi password and information then you can still use your regular iPhone 3G network. To do this you just go back to Settings and to Wi-Fi again. Once you are in here simply turn the iPhone's Wi-Fi from ON to OFF. This will turn off the ability to connect to a wireless network and will force the iPhone to go just for the 3G network. As long as you have regular iPhone AT&T service then you will now be able to go online with the regular 3G network. Once you have shut off the Wi-Fi you will not have any of the same overbearing interruptions.
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Try to Find Unsecure Wi-Fi Connection
It is always best to try and find Wi-Fi locations that are unsecured to connect to with your iPhone 3Gs, 3G or iPod Touch. Oftentimes a university or other large institution will have both secure and insecure networks, but connecting to the insecure ones is often problematic. If you are having trouble connecting to the secure Wi-Fi of a given location just contact their IT department and they should have a plan of action already in place for the iPhone. Most major educational institutions have already created a Wi-Fi connection plan for the iPhone, Blackberry and other smart phone designs.