Bluetooth is not working help and self test help

Hello out there can someone help with an experiment for me, 

i am convinced that bluetooth does not work on my device.

if i have phone wifi on, bluetooth off / router on / A.P.C wifi on. works all good.

if i have phone wifi off, bluetooth on / router on / A.P.C wifi on. works all good

if i have phone wifi off, bluetooth on / router OFF / A.P.C wifi ( there is no switch to make bluetooth ) NOT GOOD DOES NOT WORK.

if phone wifi off, bluetooth off / router on /  A.P.C wifi on. works all good.

my conclusion is that bluetooth does not work without A.P.C connection to wifi there fore if you was to be outside cooking with power but no wifi you would not be able to use bluetooth commands

please help with this dilemer thanks

P.S

and yes i have done resets, reboots, plug ins, plug outs and trouble shooting that i can think of.