My ZTE n817 keeps freezing up and Google apps keeps shutting down

Try a "Clear Cache" from recovery

1) power off the phone

2) Volume Down + Power button

3) release when the phone vibrates

4) You should now be in the recovery mode.

5) Use Volume buttons to scroll and Power button to select options

Select the clear cache and reboot the phone.

If this still continues, consider the factory reset option, but you will lose all your data.

best I found is cleaner apps combined with erasing any apps that use too much power and using other apps if possible!

the problem is most likely one of two things or both, using too much ram or background app and the pone may be overheating. the suggestions above will help out with both issues as they can be dependent on each other. too many apps can cause your phone to overheat. so try clearing cache using cleaning apps and taks managers to cut down on app and memory usage and see if that helps. I personally use cleanmaster for my android device. I hope this helps and that soon you will be swiping away on your phone