Media sources indicate that Bharti Airtel may rope in  Ernst & Young (E&Y) to do a due diligence on South African telecom major MTN, the company with which it is in talks for a complex mutual acquisition of equity to form one of the top telecom conglomerates of the world MTN is speculated to appoint PricewaterhouseCoopers (PwC) to do a due diligence on Bharti...