mobile

I rooted my AT&T Galaxy S5 on Android 4.4.4, then I updated to Lollipop (because I didn't want root anymore). The phone still says custom when it boots up and in download mode it says "System Status: Custom" (and it's not rooted anymore). I cannot downgrade with Odin because it gets stuck at the bootloader (I was able to boot the phone up and it works now but it still says custom when I boot it up. I'm still on Lollipop). Just so you know, I didn't update with safestrap because I never installed it. How do I change the device status to "System Status: Official"? Please respond to this because I would greatly appreciate it.