I had this issue with my phone, and it was a huge pain. The biggest concern: I didn't know when my phone was off network (voice, data, etc.). The fix, for me, was simple: a new SIM card.
So this is weird. I've downloaded, checked MD5, etc., Odin-ed the file and rebooted - twice - with no problems, but when the phone comes up, the software and Baseband still show NC5. It shows stock (with Knox tripped), with the updated OS (4.4.4...
Just noticed the same thing after leaving the house for the first time. My mistake everyone.:(
I dirty flashed.
I also just found out Sprint's network is going through some kind of cascade failure in North Carolina, Georgia, and Maryland (mayb...