否，您无法在Windows Phone 7设备上安装Windows Phone 8 OS.这些设备不符合当前的硬件要求. Windows Phone 7.8更新将于2013年初发布，这将使Windows Phone 7设备拥有新的 瓷砖尺寸.不确定是否还会有其他改进

No you can not install the windows phone 8 os on a windows phone 7 device.  The devices do not meet the current hardware requirements.  There is a windows phone 7.8 update due in early 2013 which will make windows phone 7 devices have the new tiles sizes. Not sure if there are going to be any other improvements