This document lists and provides brief details about several mobile phone companies - Sony, Oppo, Apple, Vivo, and Xiaomi. Key details include Sony having a nice camera and 2GB RAM/16GB ROM, Oppo having the best camera with 16MP ROM and 3GB RAM, Apple having a high price but being a valuable company with dual 13MP and 8MP cameras, Vivo having the Vivo V3 model with nice RAM and ROM specs and a super camera, and Xiaomi noting the Mi Note 3 and upcoming Mi S3 with nice RAM/ROM and future models.