Tata Group is said to be planning to build the biggest iPhone assembly plant in the country, as the company takes advantage of the Cupertino company’s plans to ramp up iPhone production in India. The factor is being planned in Hosur in Tamil Nadu and Tata is said to be planning to begin operations at the iPhone assembly plant in 12 to 18 months.Tata Group is said to be planning to build the biggest iPhone assembly plant in the country, as the company takes advantage of the Cupertino company’s plans to ramp up iPhone production in India. The factor is being planned in Hosur in Tamil Nadu and Tata is said to be planning to begin operations at the iPhone assembly plant in 12 to 18 months.