Last topic I found regarding this was from 2016, however I think this could be helpful to many.
What burner phone + prepaid / plan combination do use?
How often do you change your numbers?
I'm thinking about using it for: claiming sign up offers which are linked to phones / numbers, 7-11 fuel, gumtree etc where.
Basically everywhere you don't want to have a company or person know about your real number.
Currently Coles sells Amaysim $10 prepaid sim cards for $3 which you could use for a month rinse and repeat.
Unsure if a new cheapo phone or a used Android from Gumtree would be the better option.
I know a guy who who’s a guy who can…. get things. If you know what I mean. ;) ;) ;)