"I'm not sure what to tell you" ??? Please ,control yourself by http://www.pasternack.com/t-calculator-friis.aspxSecond my opinion smartphone frontend receiver is automatically protect for overload and adc conversion is made for a precise range power...

In the link budget for Ptx=20dBm ,Transmitter Gain 1dBi, Receiver Gain 1dBi,Frequency =2.5Ghz,Distance =1Cm  then recived power is equal to +19.60dBm!!!!http://www.pasternack.com/t-calculator-friis.aspx    

Please,explain me theoretically with physics why there are 40db attenuation from tx antenna (eirp +20dBm) to rx receiver( -20dBm) when the distance each other is very very near (near field) and frequency is about  2500MHz.Thanks

Ok if my application show me a -20dBm value near to antenna and I consider it as +20dBm then ok ,but  if my application show me a -60dBm value far away from antenna router I can't consider it as  +60dBm value  because it's physically impossible!!!

Any wifi analyzer application on my Android show me RSSI negative values always.Near antenna router value is about -20dBm and far away vaue is about -60dBm.If I convert them in positive value it's phisycally impossible.