Firmware not updating to latest version

[AC Question]

I used to have an s4 that went through many firmware updates, the latest of which installed kids mode.
I then broke that phone, and had to replace it.
The replacement installed a couple of updates, but doesn't have kids mode.
So, I assume that I don't have the latest firmware.

The original phone was one provided as part of a contract with Vodafone; the second phone is one I bought from Amazon.

Question 1: how can I check what is the latest firmware for my phone?

Question 2: assuming I don't have the latest, what can I do about it?

Thanks in advance.

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Info from 'about device' section:
Model number: GT-I9505
Android version: 4.4.2
Baseband version: I9505XXUFNB9

 

[belodion]

This site may be of help:

https://forums.androidcentral.com/e...com%2Fus%2Fsupport%2Fdownloads&token=x7ARr5Iw

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