Hi kailashrathii
Welcome to BlackBerry Support Forums
The recent version of BlackBerry World need the latest version of BlackBerry ID software ,If you are having problem in updating your BlackBerry ID software then first try a Battery pull restart by removing the battery while your device is Powered On , after reboot if you are still unable to update BlackBerry IS software then On your Homescreen Go to Options > Device > BlackBerry ID > press the menu key then Click on Check for Updates.
If you get the same error message then try the same over WIFI .
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