Why won't my Samsung Galaxy s4 sgh-i337 update to 5.0.1. It's still at 4.4.2. Even though i check for updates everyday. And I can't manually update it because it requires a SD card which I don't have
Welcome to Android Central! Are you still on the AT&T network? Carrier-specific phones usually have to be on that carrier's network in order to receive the official update.
Have you tried using Samsung Kies or Smart Switch?