你好，
下面是我的一些建议
- 在另一个升级到Windows Phone 8.1的手机进行测试，看是否报错。这样可以排除是否手机更新的问题；
- 建议参考:
http://msdn.microsoft.com/en-us/library/windowsphone/help/jj206735(v=vs.105).aspx
链接上提出了很多种错误形式，可以根据错误信息进行定位；
谢谢！
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