*3370# ( EFR CALL QUALITY)

Just dial
*3370#

To activate EFR (Enhanced Full Rate).


  • Your phone uses the best sound quality but talk time is reduced my approx. 5%

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To deactivate it, Enter the code-


#3370#

1 comment:

simplecall said...

I am looking for a reliable connection for International calling which offers crystal-clear Call quality without any dropped calls or poor connections. Can anyone suggest me something?

11 December 2012 at 14:08

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