By Yimou Lee and Adam Jourdan HONG KONG/SHANGHAI (Reuters) – Chinas ZTE Corp is banking on high-end smartphones to help raise global shipments by a third next year and establish a brand to rival Samsung Electronics Co Ltd and Apple Inc at home. ZTE and other Chinese smartphone vendors are increasingly tapping the high-end sector as competition has pushed margins so narrow that their mainstay low-priced handsets in China are barely profitable. The worlds ninth-biggest smartphone vendor launched its Nubia brand in 2012, while peer Huawei Technologies Ltd [HWT.UL] is gunning for high-end recognition with its Ascend series and Lenovo Group Ltd is touting its Vibe and K lines.