I have seen a lot of requests for help with IP based activities/upgrades/reconfiguration and so on and so forth,
On a computer, you use IPCONFIG in the DOS command or in the Command prompt, depending on which OS of windws you are using, pre-XP or post-XP.
So on a phone how would you find your IP. Here it is,
1. open your phone web browser
2. type in the url www.whatismyip.com
3. your phone IP is displayed for you.
This work on a computer also, desktop or laptop. There are other cool features in there as well, including throughput speed test. Be mindful of data charges while using browser.