Iphone asks for password when connecting to home network

passwords are case sensitive, so the problem is possibly just that you have capitals in the password and these are not specifies when entering the password into the iPhone

To connect your Iphone to home wifi you should go into the 'Settings' app then there should be a option where you can click on 'Wi-Fi'. If the wifi is on you should see green next to wifi. Under 'Choose a network' select your home wifi. If it is password protected it will ask you to put in your password, if not it should automatically connect.

What Type/Brand of router ?????

Apple's iPhone is a multimedia connectivity tool.
As such, the iPhone employs a sophisticated system to keep you connected to the web via WiFi signals so that you can stay up to date with email, mapping and media.
To use the iPhone's WiFi feature just follow these steps.
Tap a network.
If you have not yet used your iPhone's WiFi or if you're in a new WiFi area, the iPhone will show you a list of available networks.
Tap the network that you want to connect to in order to connect.
If there is a password required a little lock icon appears.
Enter the password to connect to locked networks and continue to surf the web.
Monitor your signal.
As you use your iPhone, especially if you're moving around, you should take a look at the signal strength of the connection.
The strength is indicated by a small, black broadcast symbol that stacks arches, or rounded bars, on top of one another.
The more bars there are the better the signal.

Make connecting to WiFi automatic or manual.
The iPhone is equipped to automatically search for available networks and connect you to one.
If you do not want the phone to search for networks, select the "WiFi" option on the phone's menu.
Then select either the on or off option of the "Ask To Join Networks."
Turning this option off requires that you find networks manually.

Forget a network.
Once you connect to a WiFi network once the iPhone automatically remembers the network and connects you to it at a later opportunity.
To forget a network so you don't get automatically connected choose the "WiFi" option on the menu.
Then tap the right arrow button next to one of the networks that the iPhone already remembers. Then tap "Forget This Network" to erase the phone's memory of the network.

Troubleshoot Wi-Fi Connection Problems on an iPhone
If you experience Wi-Fi connectivity issues on your iPhone, you may need to reset the Wi-Fi connection.
Your connectivity issues could be caused by the wrong password if you are having trouble logging into the Wi-Fi network or from a problem in your iPhone's settings.
By resetting the Wi-Fi connection, you are clearing out the previous settings created when you first connected to the network.

Tap the Settings icon on the iPhone's home screen, and tap the Wi-Fi tab.
Swipe the switch on the Wi-Fi tab to ensure Wi-Fi is enabled on your iPhone.
Tap the blue arrow button on the network tab you are connected to in the network list, and tap "Forget this Network."
Tap the "Forget Network" button that appears on the pop-up menu to confirm the action.

Tap the Wi-Fi Networks tab in the upper-left corner to return to the previous screen, and tap the network's tab in the network list to re-join it.
Press the Home button on the iPhone, and tap the Safari icon on the home screen to test the Wi-Fi connection.
Tap the blue arrow icon on the network's tab if the connectivity problem persists, and tap the "Renew Lease" button at the bottom of the network's window.
Tap the "Renew Lease" button on the pop-up box to confirm the action.
Tap the Home button on the iPhone, and tap the Safari icon on the home screen to test the network connection.

lift your modem and look at the bottom side of it there would be an serial key ir password there simply copy it down and it would connect to it.

Hi Rachel

your phone is trying to join your homes network.
If you want it to then you have to verify that all network information is correct.
You may even need a network key (password)
simply go to your settings on phone and fill in th blanks.
The advantage is that you will not be billed for any data usuage. If you put skype on your phone you wouldn't be charged for calls either.
Well good luck hope this helps

I find that when it comes to iphones and home wireless networks, that using 64bit encryption is the best. I'm not sure what you are using now, but give this a try.

Is the wireless router switched on, can other devices connect to it? If so try resetting network settings by selecting
Settings > General > Reset > Reset Network Settings. Note: This will reset all network settings, including passwords

After this try to join the network again

First, Can your 3GS connect on ant other Wi-Fi? If so the issue is specific to configuration on either iPhone or BT Home Hub.
Second, Does BT Home Hub configured for any kind of mac-address security? Check that, if it does either remove it or add the iphone mac-address, you can find the iphone mac address under network setting.
Third, Does Home Hub have limit on number of devices that can connect to it, some do. check that and make sure that you increase the limit or just remove the restriction altogether.
Fourth, IS BT Home Hub Wep enabled? If so the password/key you are entring on your iPhone must be exactlythe same. Or just remove the wep encryption to see if your iphone 3GS can connect.
Fifth, If your old 3G is able to connect to your BT Home Hub, then just make sure you are not FAT fingering the keys and entering a different key.

it will happen from time to time....it will go away in probably a week or 2

You need to select the 'Settings' button on the home screen, then make sure that the 'Ask to Join Networks' option is turned on. Choose your network, and then enter in your password. I've had the same problem before, and it turned out that my phone wouldn't connect without setting the computer to require a password. If this doesn't solve your problem, please let us know.