第二步：下载并允许未知来源 点击下载按钮后，设备可能会提示你允许安装“未知来源的应用”。在“设置”中打开“来自未知来源”的选项。 Wickr Me can be an IM Instrument that lets you talk to some other app person in a totally protected way, working with messages that vanish without...