I'm curious, is it the power reduction claim by Apple that is impressive, and where exactly does it come from? Because as I understand it, transmitting a signa

I'm curious, is it the power reduction claim by Apple that is impressive, and where exactly does it come from? Because as I understand it, transmitting a signal is the main power drain. If you transmit with less power it would mean a lesser range and lower signal quality. So Apple can't just have their phone transmit a signal with less power...