[Q] Android ICS - Answer calls via BT headset issue

Hi Team

My device is GTP7500 tab. I have CWM 10 v 5.5.0.4 and installed Android ICS 4.0.4

Since my tab is for 3G the GSM is not enabled by default from manufacturer. So i have enabled GSM voice through customization.

My issue is im not able to answer the calls via headset (Bluetooth)

I am able to pair the device and it states connected but not able to use it for answering calls.

Can anyone help on this.

Regards
kv