[Q] Need help getting the 5.0 update on my Galaxy S4 (SCH-I545) topic

I rooted my phone a few months ago and everything was fine. But recently I was prompted to install to 5.0 Lollipop update. I tried and it failed. After some googling I thought it was the fact that I'm rooted. So I unrooted it and now no matter what I do with ODIN it fails.

I've tried:

Changing my kernel. I tried two different kernels, both failed.

Installing Lollipop through 3 different methods. They all failed. (The OTA update, using ODIN, and through recovery mode using my SD card)

Basically ODIN always fails, and any other one-click root method fails as well. (Towelroot, Kingo App, MobileGo Wondershare)

Backstory: The only thing I can think of causing this much trouble is the fact that when I rooted my phone I had to use an old kernel. Everything was failing so I had to roll back my kernel in order to root. I did that. And then my WiFi stopped working. So I changed my kernel back to the original one. I don't know if this would do anything but figured it was worth mentioning.

The goal is to get the 5.0 update installed on my phone. I will settle for just re rooting my phone though.

Phone info:

Model:
SCH-I545

Android Version:
4.4.2

Baseband Version:
I545VRUFNK1

Kernel Version:
3.4.0
Thu Aug 28 2014

Any ideas on why I can't install this update?