Idea also launched an entry level 3G smartphone, Idea !d 1000, aimed at first time smartphone buyers and is priced at Rs 5,400, it said in a release.
The handsets will be available in the market from next week.
"Lack of availability of affordable 3G smartphones with high-end features is the deterrent to mobile data growth in India. Idea has tried to bridge this gap by offering the best value for money 3G devices, in addition to our superior 3G products, services, and network coverage," Idea Cellular CMO Sashi Shankar said.
"This has encouraged us to further expand our devices portfolio with the launch of our first 5.5-inch screen 3G smartphone, ULTRA II, and the entry-level !d 1000, which will help us target consumers at both ends of the spectrum," he said.
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The 5.5-inch Ultra II runs of Android Jelly Bean 4.2 and is powered by a 1.3 quad core processor.
The handset sports a 8 megapixel rear camera with HDR and a 2 MP front camera with LED flash, it said in a statement.
The ULTRA II is available in white and electric graphite and is priced at Rs 12,500. The phone will be available at Idea's major 3G markets -- Andhra Pradesh, Kerala, Maharashtra & Goa, MP & Chhattisgarh, Haryana, UP West, and UP East.
Idea !d 1000, which features a 3.5-inch screen, is powered by a 1 GHz dual core processor and runs on Android Jelly Bean 4.2 OS.
This dual-SIM handset also has a built-in social networking app. It carries a 2MP camera and an internal memory of 4GB, expandable to 32 GB. The smartphone will be available across Andhra Pradesh, Kerala, Maharashtra & Goa, MP & Chhattisgarh, Gujarat, UP West and UP East.