G900F CM13 Baseband Update confused?

hi,
I have a samsung S5 G900F UK on O2 network, running CM13.
Baseband
G900FXXU1BOK5 - currently on

So im abit confused about baseband.

Can update my Baseband to latest from
--http://ift.tt/1T16Aib

Or do i need to find one specifically for O2 uk baseband and update that?

Can i create a backup in philtouch recovery, will that also backup the baseband with it? so i can restore baseband and rom together?

what are the advantages of updating baseband?

cheers

via xda-developers http://ift.tt/1VmjVHU

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