Audio calls work fine in WP7610 but no audio is heard on WP7609

[jack.heaffey]

I have faced a silent audio issue, please see:

No audio on call

Hi, I’m using the le_mcc and le_audio APIs to establish a phone call and to play samples using le_audio_PlaySamples. This works perfectly for the majority of the time, however I have observed occasions whereby the call is successfully established but no audio can be heard on the receiver phone. When the cell module is in this errored state, all future calls are silent until I reboot the module. The issue seems to occur when a phone call is initiated too soon after a previous call is hung up. …