Question - I have a Droid LG V20 , think the device is from 2017. Never updated. Running 8.0 When I run the Tmobile app (wanted to peek at settings), its aski

Question - I have a Droid LG V20 , think the device is from 2017. Never updated. Running 8.0 When I run the Tmobile app (wanted to peek at settings), its asking me to update. Should I do it ? Am i safe if i dont update this monster to suck my data ?