New Delhi, May 14 -- Bharti Airtel Ltdclocked a fivefold jump in March quarter profit thanks to a one-time gain, even as revenue per user, a key metric of profitability, remained flat. Net profit at India's second-largest telecom operator stood at Rs.11,022 crore against Rs.2,072 crore a year earlier,as it added a deferred tax benefit of Rs.5,913 crore. However, compared to the December quarter when it gained from the Indus Towers consolidation, profit was 25.4% lower. Consolidated Q4 revenue of Rs.47,876 crore was up 27.3% on-year and 6.1% on-quarter, driven by higher India business, revenue growth in Africa, and the full impact of Indus Towers consolidation. The India mobile services business, which contributes 56% to overall revenues, sa...