AT&T Network Logo on the S4

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http://forum.xda-developers.com – I am having network issues lately. I am on MF3 and rooted. I notice that the AT&T network logo on the top left comes on when I first unlock my phone and then goes away. For some reason I thought that AT&T always showed up there if it was on the network. Is it going away normal or could it be an indication of network problems? (HowTos)