Chinese smartphone maker Xiaomi on Monday unveiled a new version of its in-house Xring smartphone processor, betting that deeper control over key components will help strengthen its supply chain and reduce reliance on external chip suppliers. The introduction of Xring O3 comes a year after Xiaomi launched its first proprietary smartphone processor, the Xring O1, marking the latest step in the world's third-largest smartphone vendor's push to join rivals such as Apple, Samsung Electronics and Huawei in developing its own chips.