I have done an android application for initiating a call to another number. 

Steps

1. User initiate a call using application. 
3.Receiver accepts the call and conversation is in progress. 
4.User tries to initiate a second call

But the connection has gone and a message is displayed .Error message"Error!!Check Your Internet Connection" is displayed now on trying to initate the second call..

GPRS/WIFI is gone when the call is intiated first

Pls Help

But in emulator its working fine... In android device the connection has gone