Niantic, the studio behind Pokemon GO announced that it's dropping support for 32-bit Android phones starting August. The studio issued a brief statement explaining the need for such a change to streamline its development process and focus on supporting newer devices and operating systems. Once the kill switch is flipped, you will no longer be able to access Pokemon GO accounts from the old devices and will have to migrate to a newer 64-bit device if you want to continue your quest to catch Pokemons. Niantic also recommends you to back up their account info and passwords. The...
Source: https://www.gsmarena.com/pokemon_go_will_not_work_on_32bit_android_phones_starting_this_august_-news-43770.php