Taiwan’s Big Brother mobile customer service, simple and intuitive interface design, combined with a number of intimate and practical functions, allows you to easily grasp the most real-time billing information of the door number, and quickly query the required functions and promotion activities. It is a must-have for Taiwanese users Exclusive customer service with you! "Service Features" ●●Swipe up and down easily with one hand, grasp frequently used services at any time •Bills: simply view t