Hi is it possible to configure a fixed IP on my iPhone? I'm interesting in something like the location provided my the "apple" menu in OS X.
It's in the network settings:
Visit http://help.apple.com/iphone/ if you want pictures to guide you to the network settings part of the settings app.
This only works on Wi-Fi since your carrier issues you an IP address. You could also use a VPN profile to tunnel all traffic to a fixed IP if you had a router / server set up to provide that sort of IP / DHCP to iOS devices.