I just purchased an AT&T Note 4 from Best Buy. I'm just evaluating it at this point, but I noticed it was running 4.4.4. I popped my the sim from my current phone into it and it's now on the AT&T network (Can make calls and receive txt msg), but it says that no updates are available. It wants me to wait 24 hours before checking again. I'm only keeping the phone for a few days before I return it. How long should it take before it updates to 5.0.1? Thanks,