Help Update-S4 Rooted Still on 4.2.2

spyder5157

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Nov 26, 2012
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Searched all over, but really need some help getting started.
I have a Rooted VZW S4, now on Straight Talk:
1. SCH-I545 (Was Verizon , now on Straight Talk)
2. Android 4.2.2
3. Baseband: I545VRUAME7
4. Kernel: 3.4.0-690088
I want to update, eventually to Lollipop. All threads I see are from 4.3+.
I have done some of this before, but been out of the loop for quite a while. If someone could at least point me in the right direction, or give me some info on getting started. Consequences of root?, etc...I would REALLY appreciate it.
THANK YOU. Looking forward.....