Hi ... Suddenly I have this problem with my iPhone4 . Whenever I am dialling or receiving calls, I am not audible at the other end , but if I am putting phone on speaker then I am audible to other person .Not sure if any setting is changed or device issue

Hi ... Suddenly I have this problem with my iPhone4 . Whenever I am dialling or receiving calls, I am not audible at the other end , but if I am putting phone on speaker then I am audible to other person .Not sure if any setting is changed or device issue. Please suggest or help.

There's an Apple help page on the DNS problem - at http://support.apple.com/kb/TS3408
The first thing to try is changing your DNS settings - and for that you need to open System Preferences, then the
Network section.
In Network - click  on Advanced - then the DNS tab
under DNS servers - use the + button to enter two extra lines
either these, from google dns
8.8.8.8
8.8.4.4
or from OpenDNS
208.67.222.222
208.67.220.220
then click OK & then 'Apply'
You would need to do that seperately for the Cable (Ethernet) settings and Wireless (Airport)

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