Galaxy S6 Edge :: Completely Unresponsive - Totally Black Screen?

all of a sudden, after my dinner this evening, my S6 edge was completely unresponsive.

pressing the power button for 7+ seconds, as per Samsung, did not work at all. totally black screen, no response. pressing the volume DOWN button, power button, and the home button, also to no avail. on the other hand, while on the phone to TMobile's customer service to report this non-functional brand new phone,

i was continuing to press the abovementioned buttons frantically. well, while i was talking to TMobile via my landline, the phone eventually booted up. this was VERY haphazard. The only thing i recall reading about this was to press the power button for 7 seconds, which Samsung had said was the equivalent of pulling out the battery.

right. that's bogus. that did nothing for me. yet, by pressing the volume up or down button PLUS the power button PLUS the home button,

i don't know exactly which combination eventually worked, as i was trying various permutations, eventually, the phone booted up. this does not give me confidence in this phone.

What eventually i did to make this phone boot up eventually. all i did was to be on the phone with TMobile and press the power button plus the volume up or down button, plus the home button, and eventually, it rebooted and came back to life.