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I've seen the official Samsung response which is January 2019.
Vodafone wont comment on firmware release dates as oer their firmware statement.
If yours is a branded Samsung phone i.e. supplied by Vodafone then you would probably need to wait u till.v have tested it before letting Samsung send it out.
Current Phone > Samsung Note 9 _512Gb > Model: SM-N960 Hybrid-Duos.
Samsung Gear s3 Frontier Watch.