1. A method of integration of content caching with a network operator for traffic alleviation a wireless network, the method, comprising: in response to a determination that a cached element stored in a local cache of a mobile device is invalid, detecting, by an operator proxy of the network operator, a poll from an application on a mobile device which would have been served using the cache element from the local cache on the mobile device; and forwarding, at the operator server, the poll from the application on the mobile device to a caching proxy server which is different from a server-side proxy server; wherein, the cache element in the local cache is invalidated when the server-side proxy remote from the mobile device and not the same as the operator proxy or caching proxy server detects new or changed data from a content provider by determining if the response provided to the server-side proxy from the caching proxy server is not the same as a prior response for same or similar content at the server-side proxy server.