To get into the programming menu, from the call screen, enter ##PROGRAM and press send. Enter code 000000.
In option 04, you can change the vocode option to EVRC-B, or 13K, it made my in-call audio sound better. I'm currently using the 13K setting. Your phone will reset after you exit and apply the new setting.
Warning: Be careful what options you change in the programming menu, you could potentially brick your phone.
Edit: Forgot to give the code of 000000 to enter at activation screen.
http://en.wikipedia.org/wiki/Enhance...e_Rate_Codec_B
In option 04, you can change the vocode option to EVRC-B, or 13K, it made my in-call audio sound better. I'm currently using the 13K setting. Your phone will reset after you exit and apply the new setting.
Warning: Be careful what options you change in the programming menu, you could potentially brick your phone.
Edit: Forgot to give the code of 000000 to enter at activation screen.
http://en.wikipedia.org/wiki/Enhance...e_Rate_Codec_B