 The partitioning of the ISM frequency band has not changed being still 40 channels spaced at a distance of 2 MHz.This is an essential differences over Bluetooth 2 EDR which did also double the data rate but it is doing that by employing a π/4-DQPSK or 8-DPSK phase modulation on a 1 MhZ channel while Bluetooth 5 continues to use just frequency shift keying.The traditional transmission of 1 Mbit in the Bluetooth Basic Rate was renamed 1M PHY in Bluetooth 5.