I'm just glad to hear that this is 'normal' among the rest of my fellow users. It must just be something Samsung has implemented for whatever reason to notify us that it is swapping towers or whatever stupid thing. I've seen there are a couple apps that correspond to it, but I'm not going to remove them.
I could rant all day about how silly it is that Phoenix is like the 6th largest city in the U.S., yet the entire West coast has pretty much been neglected with LTE when it comes to Sprint. I've tried doing research and it seems that Sprint's Clear Vision plan is supposed to upgrade every tower that provides 3g to be able to do 4g LTE by the end of 2013 if i'm not mistaken. It looks like they have had this plan for a few years now though and at this rate I should have spotty LTE at best by 2018 if I hang on to this phone