New Delhi, June 10 (IANS) Expanding its successful A series, OPPO is all set to launch a mid-price affordable smartphone A52 under Rs 20,000 in India this week.Industry sources told IANS on Wednesday that the device is going to be first smartphone to feature a punch-hole display in the affordable segment.Earlier this year, OPPO launched A31 for Rs 11,490 for the 4GB+64GB variant and Rs 13,990 for the 6GB+128GB variant.The company is also expanding its Internet of Things (IoT) portfolio.After receiving a good response for its OPPO Enco headphone series, the brand is also set to reinforce its position in the IOT segment with a new offering that would offer immersive surround sound experience. --IANS bu/na