Phone transmission is breaking up

The Bluetooth phone connection in my 05 sounds to others like it is cutting in and out, like a weak signal. That is, the phones themselves have good send/reception. Using the Bluetooth the reception is good but the sending is spotty and broken. Any suggestions?

 

I think I may have isolated this. The signal between the phone and the Bluetooth I think is easily disrupted or blocked. The system works with no problems when there is less obstruction between the phone and the system. A phone in a lady's handbag turned away from the dash or in the back seat could result in signal break-up. Phone in the shirt pocket has no problem.