WP7的开发解锁好像对部署未签名的程序（包括自己开发的和网上破解的程序）有数量限制，学生版的限3个app，开发版10个。如果超过布署时就会提示：
You have reached the maximum number of developer applications allowed for this phone
有时候可能是看到代码0x81030119：
| 0×81030119 | You cannot install the application. You have reached the maximum number of applications being developed for the device can be installed on this development. Please uninstall a previous developer application. |
……未完待续