>>460
This change will take effect on 02/28/2018.
After that date, Trainers using affected devices may no longer be able to access their Pokémon GO accounts from that device,
or use their PokéCoins or other items in their Bags.
They will need to switch to a supported device to continue playing Pokémon GO.

no longer be able to access their Pokémon GO accounts from that device
サポート終了により、
それらの旧端末ではポケモンGOアカウントにアクセス不可能になるよと書いてあるね