IP Banned for spam on my Cellular Service?

I think Sephiroth (http://maiotaku.com/p/lordsephiroth) may be jealous of your fine katana. But really, go ahead and send him a message about the IP thing.

You can just switch airplane mode on and off. Doing so will give you another IP address since you'll be connected to another Cell Tower. There are multiple users on that IP address you had so that could have trigger the spam filter(?).