WARNING Your phone does not have CSC version?

Got this Samsung Note 4 from E Bay sold as new, a grey import i think was made for the US market not the UK, the original CSC code isATT, it says Firmwares CSC code is TGY and under active CSC Code ATT/TGY and under CSC Country USA.

I used the app Samsung Phone info and done a refurbished check and this message comes up

It looks like the firmware has been modified

WARNING Your phone does not have CSC version

Device usage counter

Headset connect-<root>

Charger connect =3830

S Pen detach=<root>

Can anyone tell me what all that means, will i still be able to use phone in the UK and get updates, the phone was sold as new but no guarantee came with it, was from E Bay so i can return it was 235 Pounds a new one in the UK is about 400 Pounds, thank you.