Problem while calling from iphone 4

[annicse]

I have an iphone 4. Software version is 4.3.5. I am having a problem while calling. Call is okay; but opposite side is hearing his own voice along with my voice. Its like a repeat to him. He is also hearing me. From my side (iphone 4) its okay.

Is this a network problem, Or for the top microphone? It does not happen all the time.

 

[aziatiklover]

U meant eco sound? maybe u were on speaker?

 

[S.B.G]

Wirelessly posted (iPhone 3GS: Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8L1 Safari/6533.18.5)

Are either of you on speaker phone or using a Bluetooth headset? Usually the BT will cause this.

 

[annicse]

actually i am not using BT headset or speaker phone. My opposite side (whom I am talking to) is listening his own voice as an echo.