great ,very thanks 
regarding to your answer → yes , the iphone11 need to deploy the bluetooth to configure the ranging process between a iPhone11 and target (DWM3000EVB)
regarding to the attach image above, your answer ,and to correct my understanding with you
first cycle {
DWM3000EVB number 1 range to red iPhone11 number 1 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 2 range to red iPhone11 number 1 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 3 range to red iPhone11 number 1 ( keep ranging 3 time to get median value) ,then ,
*DWM3000EVB number 4 range to red iPhone11 number 1 ( keep ranging 3 time to get median value) ,then *
DWM3000EVB number 5 range to red iPhone11 number 1 ( keep ranging 3 time to get median value) ,and finish ranging first cycle
}
second cycle {
DWM3000EVB number 1 range to green iPhone11 number 2 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 2 range to green iPhone11 number 2 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 3 range to green iPhone11 number 2 ( keep ranging 3 time to get median value) ,then ,
*DWM3000EVB number 4 range to green iPhone11 number 2 ( keep ranging 3 time to get median value) ,then *
DWM3000EVB number 5 range to green iPhone11 number 2 ( keep ranging 3 time to get median value) ,and finish ranging second cycle
}
third cycle {
DWM3000EVB number 1 range to red iPhone11 number 3 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 2 range to red iPhone11 number 3 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 3 range to red iPhone11 number 3 ( keep ranging 3 time to get median value) ,then ,
*DWM3000EVB number 4 range to red iPhone11 number 3 ( keep ranging 3 time to get median value) ,then *
DWM3000EVB number 5 range to red iPhone11 number 3 ( keep ranging 3 time to get median value) ,and finish ranging third cycle
}
fourth cycle {
DWM3000EVB number 1 range to blue iPhone11 number 4 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 2 range to blue iPhone11 number 4( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 3 range to blue iPhone11 number 4 ( keep ranging 3 time to get median value) ,then ,
*DWM3000EVB number 4 range to blue iPhone11 number 4 ( keep ranging 3 time to get median value) ,then *
DWM3000EVB number 5 range to blue iPhone11 number 4 ( keep ranging 3 time to get median value) ,and finish ranging fourth cycle
}
fifth cycle {
DWM3000EVB number 1 range to black iPhone11 number 5 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 2 range to black iPhone11 number 5 ( keep ranging 3 time to get median value) ,then ,
DWM3000EVB number 3 range to black iPhone11 number 5 ( keep ranging 3 time to get median value) ,then ,
*DWM3000EVB number 4 range to black iPhone11 number 5 ( keep ranging 3 time to get median value) ,then *
DWM3000EVB number 5 range to black iPhone11 number 5 ( keep ranging 3 time to get median value) ,and finish ranging fifth cycle
}
after finishing of 5 cycles above, then repeating back to do the same task from first cycle to → until fifth cycle again and looping or cycling as like this ,infinitely
QUESTION → am i understanding what you explained correctly ??
regarding to your answer as attach image above ,i do not understand clearly the way , you guide me to range DWM and phone , however *** yes , the bluetooth is needed to establish the data link from iPhone and DWM3000EVB regarding to nearby interaction Apple framework