Samsung - Galaxy S8 (SM-G950U)
Includes Android security patch level January 2019 and bug fixes.
PM your phone number and I will check it against the network. In the meanwhile, update to G950U1UEU5DSC1.
I got that update but now my connection which used to be 4g LTE before the update but now it keeps hitting 3g. I don't know how to fix it.