The Oppo K15 has been quietly unveiled in China, joining the K15 Pro and K15 Pro+, which debuted in April. The standard K15 retains the same design language as its Pro siblings and also features a built-in active cooling fan.It is already available for purchase in China and is being offered in a sole 12GB/256GB variant, which is priced at CNY 2,299 ($340).The handset sports a 6.59-inch AMOLED display with a 120Hz refresh rate, 1,200 nits peak brightness, and 1.5K resolution. It also comes with an in-display fingerprint scanner.At the back, the Oppo K15 features a dual-rear...