anyone knows why i can´t change the values in TALKING/SPEAKERPHONE ???
i have changed different values in NORMAL/HANDSET and TALKING/HANDSET without problems,
but the TX and RX values of SPEAKERPHONE will reset anytime i enter the settings
it doesn´t matter if i press APPLY or not !!!
please help me, i can´t use the speakerphone in my car, because they are so low that i hear almost nothing !!!!