EngineerMode: so I fired this up on my OnePlus5 (and subsequently rooted my device). Fun times. Can anyone explain all the features in Engineer Mode? * DDR Agin

EngineerMode: so I fired this up on my OnePlus5 (and subsequently rooted my device). Fun times. Can anyone explain all the features in Engineer Mode? * DDR Aging Test: Some sort of DRAM physical memory test? * SUPL Tool: Tries to connect to supl.google.com:7276 ?? * Network set >> RAT Mode? .... other features test your screen, colors, backlight, NFC, Wifi, etc - would still be helpful if someone with a bit more background could give some color.