Reports are starting to surface of the fact that Microsoft’s Windows Phone 7 devices can only support 15 apps with push notifications which seems rather low. Supposedly this was designed into the system (why?) but wasn’t really given the polished it needed.
When a WP7 user tries to use more than 15 apps with push notifications turned on, they receive this error message: ‘InvalidOperationException(Channel quota exceeded)’. That isn’t a very user friendly error and doesn’t really tell the average user what the problem is. Seems to me that if they were going to have such a crazy restriction they would have at least put in some kind of error saying that you can only have so many push notification apps and that if you would like to install more, you will have to disable the push notification functionality in other apps. That would have been the smart thing to do anyway.
This problem applies to both the live tiles as well as regular apps. I would like to point out that Apple doesn’t seem to have any restriction on the number of push notifications you can have although things get annoying if you have too many. Hopefully Microsoft will change this in a future update to the Windows Phone 7 operating system.