choice can be simple
Z1 supports dual-SIM cards, dual 4G networks. It can intelligently recognize SIM1 and SIM2 and automatically switch between the two based on the network available. 7-model and 18-frequency connectivity, more freedom for Internet access. You don't need to worry about which network to use, China Mobile, China Unicom or China Telecom, and you don't need to worry about changing your phone number, because with Z1, you can use any. Just insert your SIM card and stay connected. So now, it is simpler than ever for you to choose a phone.