Suggestions on how to use spare phones to make passive money

I have 2 spare phones with out sim cards that have no personal usage and separate spam emails but full internet access and Google Phone numbers

What is the best way to make passive money

The entire phones can be dedicated to this app/program

submitted by /u/Altruistic_Bat_3294
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source https://www.reddit.com/r/beermoney/comments/15v4e8z/suggestions_on_how_to_use_spare_phones_to_make/