Hello ,
The update for phone devices just started this month (March) other countries had the update faster then here in The Netherlands. If you are going to Apps > Settings > About the phone > Software update (this is via FOTA) your phone will make contact with a server if there's is an update available for the phone. The updates isn't available to everyone or the servers will crash but the update runs in multiple periods.
Hopefully I've informed you enough this far.
Kind regards.