How to: Abort New Messanger/SMS update

[PS4PROGTSport]

I know my girlfiend accepted an update on her Samsung a while ago that joined the SMS' and Messanger....messages. Is that what Will happening if I accept this, buttom of picture? And can I awoid this box on my messsanger? 

 TRANSLATING the Grey box at bottom, that starts with 'Bare' - Just one step left. Execute the activation of advanced functions to get messages tre WIFI and much more. EXECUTE saus the ble button. Will Facebook messages mix with my SMS'? 

[Sefardius]

No. It use wi-fi for send/receive sms. Only.  Cheers

[PS4PROGTSport]

Ok, thanks. Worried about the much more part.

[romanempire]

This looks like your carrier has enabled RCS, which is the next version of messaging protocol, which is why Android Messages is the preferred messaging client on new Android devices.

What carrier/operator do you have?