微软曾在2013年收购诺基亚之前自主开发过一款名为Surface Phone的Windows Phone手机原型机，代号为"Raven"[1]。近日流传出的照片显示，这款设备采用银色金属边框、720P屏幕和高通处理器[1]，运行的是Windows Phone操作系统2013年9月的内部预览版本，这个版本最终演变为Windows Phone 8.1[1]。该原型机配备独立音量键、相机快门键、顶部电源键、底部Micro USB接口和3.5mm耳机接口[1]。
这款手机的开发时间大约在2013年至2014年间[1]，原计划冠以"Surface"之名，与Surface Pro系列平板在2014年一同上市[1]。然而，这款设备最终未能面世，推测在微软收购诺基亚后其开发工作被暂停[1]。
Photos of a mysterious Windows Phone prototype codenamed Raven have surfaced, revealing what appears to be Microsoft's lost Surface Phone project [1]. Developed around 2013-2014, the device was originally planned to launch alongside the Surface Pro tablet line in 2014 under the Surface brand name [1].
The prototype featured a silver metal frame, 720P display, and an unnamed Qualcomm processor [1]. It ran Windows Phone's September 2013 internal preview build, an iteration that would eventually evolve into Windows Phone 8.1 [1]. The handset included dedicated volume keys, a camera shutter button, a power button positioned at the top, and was equipped with a Micro USB port and 3.5mm headphone jack at the bottom [1].
Development of the Surface Phone appears to have stalled after Microsoft's acquisition of Nokia, suggesting the company's smartphone ambitions were redirected following that deal [1]. The device never reached consumers, remaining undisclosed until these prototype images recently surfaced [1].
