I'm trying to connect my iphone to a friends wireless router and it keeps telling me I'm entering the wrong passkey

turn on WPA protection and enter a passkey on the router, you will then have to reconnect to the network with any wireless device that you are using and enter the new passkey

Dear friend fist turn on your iPhone wifi and when your router is find in your iPhone select the router name and enter your password same password use when you conncet Internet with your laptop ....,ok

If you mean the wireless passkey, to see it you'll need to enter to setup mode of router normally done by an Ethernet (wired) connection, at the wireless setup tab you can see the defined passkey, also SSID (wireless network name) cyphering type, etc.

There are 3 things to try:
1: reset router
2: on iPhone, Settings, General, Reset, reset Network Settings.
(this erases all saved network settings, if you use other wifi, you will have to set them up again in the iPhone)
3: Change the password on the router, try to use a 13 character password if possible, as this seems to sometimes help.

If all that doesn't work, then you may have an issue with the phone itself.

This could be if you r not enterning the correct wireless passkey.
If the key is wrong get to the router home page an then check or change the wireless passkey. You can also reset the router to take off the security.

You may have a setting on the router that limits the number of authenticated wireless connections at one time. You will have to enter the web utility and check the wireless settings, particularily the security settings.

Passkeys need to match in both the router/access point and the wireless adapter attempting to communicate with it. Whoever configured the router should be able to supply the WEP/WPA passkey / passphrase / network key If your router does not have a passkey ... you are attempting to attach to the wrong wireless router. (if that is the case you should consider assigning WEP/WPA security to your wireless networl (router/accesspoint and adapters)

ok, you seem to be going around it the wrong way round, if you are trying to connect to your friends network you would not connect to his pc you would connect to his router, so you cannot use your router to connect to his. assuming you have a wireless network adapter, which you must have, you simply connect to your friends router via your pc and not your router, you cannot have one router connecting to another, only signal boosters. when your'e network adapter detects a network, select your'e friends and then enter the passkey when prompted, so turn off your router,as it can only be used for your own network, as it musn't be connected to your modem, or else you wouldnt need to connect to your friends. If you want to connect to your friends pc for file sharing make sure he has is sharing set up and you both have the same workgroup name e.g. mshome

Yep, I had the same problem with my iPhone as well (32GB 3GS).
Had the signal NO problem for about a week then POOF it was gone. WTF?
Prowled the boards looking for a solution.
Tried resetting the phone, resetting the Wi-Fi, switching airplane mode on and off, forgetting the network, etc.

HERE'S YOUR SOLUTION :
Go unplug your wireless router's power cord.
Wait 30 seconds.
Plug it back in.

Your iPhone will reconnect, and you'll be back in business.

Jack