I have wifi In my house but my iphone only works every now and then with the wifi. Can you help me??

need more details to be able to help you. in the wifi section can your router be seen by the iPhone. Does the wifi on and off switch work in the preferences ?

Is it on airplane mode

Might need more info regarding your network setup on that one but I did come across an iphone or two that wouldnt connect to a wifi because the SSID was using _nomap, probably not the case in your situation though.

Turn off your security because 10.5 with wifi doesn't play nice with router passwords.

Try performing a soft reset by pressing and holding down the power button and the home key at the same time.

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.

If you want to use wifi only when your at home you can go in and manually disable the cellular data so the internet will only be wifi based. Probably saving you MB's and data cost.

Go to Settings, General, Network, then simply turn off the Cellular Data. Then it won't connect anymore to the cell data and rely only on wifi when your connected to it.

And simple follow the same steps and revers the process when your out on the go.

Thanks