In the end, it comes down to the Budget Telecom Network Model. The recent Bharti 10.7 billion USD offer for Zain has depressed share prices and generated a big debate. But it really boils down to this: The trick for Bharti, which pioneered low-cost telecoms in India, will be to bring down Zain’s high cost base and win subscribers, say analysts — and to get subscribers to talk more using lower tariffs. Bharti is famous for its so-called “minutes factory” business plan — the low-cost, high-volume model that has made it India’s leading mobile company.