"BlackBerry Push Service Development SDK ." The BlackBerry Push Service is an essential component of the real-time, always-on experience of BlackBerry smartphones. It can be used to easily and safely convey information to all your users. It also allows your application to process information in the background and alert users.Use the BlackBerry Push Service to incorporate the characteristics smartphone customers LOVE into your applications, including improved Battery Life, applications that run in the background and the ability to get instant information.To use the BlackBerry Push Service SDK, be aware of the following considerations:آ· You must identify the following requirements for your Push Initiator:آ· Whether it uses the BlackBerry Internet Service or a BlackBerry Enterprise Server as the PPGآ· The number of daily push request messages it submits to the PPGآ· The size of the file or content that is included in the push request messageآ· If your Push Initiator uses the BlackBerry Internet Service as the PPG to deliver content, you must register the Push Initiator with Research In Motion. آ· To Create a content delivery solution for BlackBerry devices using push technology, you must develop the following componentsآ· A Push Initiator (an application that submits push request messages to the PPG) for the server sideآ· A push-enabled application (an application for the BlackBerry device that receives the content) for the client-sideWhat's New in This Release: [ read full changelog ]Support for Subscription Check API:آ· Support for the Subscription Check API has been added so you can take advantage of it through the SDK APIs. A set of sync APIs have also been added to automatically synchronize subscriber status with the SDK database.Statistics gathering:آ· Allows you to better track data regarding push operations (such as push count and remaining quota) and SDK operations (such as memory, thread pools, work queues).