Moto X4 - will test code 4636 show everything working?

[Mac29]

I've surfed all over trying to find out if entering the *#*#4636#*#* code will show that every function of my phone is working correctly. How do I discern that?

If I dial the code and get a screen(s) should every item show text in a field or do I need to do something to run a test? If an item shows blank does that indicate it is not working?

I'm trying to verify everything works before I do the upgrade from 7.1.1 to 8.1 and I'm also hoping the upgrade will not hose anything. So far I've found only isolated issues for some phones when doing the upgrade.

Thanks in advance for any feedback,

Mac

 

[Rukbat]

It shows some statistics about the phone - Phone, Battery, Usage - and lets you set Set Device - Preferred network type.