您好Vijay，

您的论坛错误。实际上这些论坛专门用于Windows Mobile / CE相关查询。

我如何回答您的查询。目前Windows Phone 8.1开发预览版已发布，6月24日是Windows Phone 8.1消费者版的日期。

开发预览（一旦你这样做，你就可以不恢复到Windows Phone 8）  -

http://dev.windowsphone.com/en-us/develop/devpreview

Dear,

How can I upgrade my windows8 lumia to windows8.1

regards,

vijay

Hi Vijay,

You are in wrong forums. Actually these forums are dedicated to Windows Mobile/CE related queries.

How ever I am answering to your query. Currently Windows Phone 8.1 dev preview is release and 24th June is the date for Windows Phone 8.1 consumer version.

Dev preview( once you do it you can not revert back to Windows Phone 8) -

http://dev.windowsphone.com/en-us/develop/devpreview