If I understand correctly, the problem is not Android force closing apps because of low memory (which would be showing the app not responding message constantly). It is that nothing continues to run in the background, because the system takes the liberty of "force closing" apps when you simply exit them or swipe them from the recent apps screen.
I believe the problem has to do with the software that ships with the phone. Unfortunately there doesn't seem to be a way to change this setting, and without unlocking the bootloader and installing a custom ROM, we're probably stuck.
Был ли этот ответ полезен?