This is very very cool - I have been looking for something very similar to just what this app does for some time. It works well on my 8900 (18.104.22.168).
I did have to reboot after installing to see the custom icon (until then I had only the default icon) and curiously didn't get cell service on the reboot. The utility actually showed me that I had only a T-Mobile tower (I'm on AT&T) so this explained why I only had SOS service. A battery pull later and I was back on the AT&T tower - but knowing that I had acquired a tower but not my provider's tower did save me a moment of angst. Thanks for a useful app!