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What makes HTC Desire 728 Dual SIM unique?

Here are 4 unique features & highlights of HTC Desire 728 Dual SIM :
1 The thinnest HTC phone priced around Rs. 12,000
2 The #2 HTC phone priced around Rs. 12,000
3 The #3 phone priced around Rs. 12,000 with 2 GB RAM
4 The #3 lightest HTC Phablet