[bcsco]

I did a Google search "cell phone IP address" and came up with this: http://research.microsoft.com/en-us/um/people/maheshba/papers/ephemera-imc09.pdf. Judging from this sentence early into the document...

As with any wired host, a cell phone exposes limited information to Internet servers in the form of a User-Agent tag and an IP address.

...cell phones do provide an IP address. I'd expect that address would come from the service provider, so it may be static, but that's a big assumption on my part. Don't have the time to delve into this further today, but there may be some worthwhile stuff in the document, or other links from the Google search.

[CAluvdubya]

Thanks for the info. I’ll see if I can read up and find out more.