1. During the setup process, there is not English (United States). So, I do use English (United Kingdom) to continue.
2. This is more serious problem. Even getting the AT&T signal, when I went to the APN settings, it keeps saying no SIM is detected. I tried to add a new APN (since none existed at all) to set up the mobile network. Upon saving, it still showed me "No SIM is detected" and not saving the APN I just entered.
2) working on it