I AM USING A GSM NO. 9023674311 FROM SIX MONTHS. THE PROB THAT I AM FACING IS WHEN MY NO. IS BUSY AND IF THE THIRD PERSON IS CALLING, OPERATER REPLIES THE NO. IS NOT RESPONDING AND THE SECOND PROB IS I AM NOT GETTING THE PERSON WHO IS ON WAIT WHEN MY NO. IS BUSY. I TRIED A LOT TO CUSTOMER CARE BUT EVERY TIME NETWORK IS BUSY. WATH SHOULD I DO? read full review »