Official software downloads for the (BlackBerry OS 7.1) are no longer hosted on official BlackBerry servers, as the company ended support for legacy devices and shut down its download portals. To update your device now, you must use archived firmware files and BlackBerry Desktop Software on a Windows PC . Essential Update Resources
You turn to the archivists.
: This is a critical step to allow firmware from one carrier to work on another carrier's device. Navigate to: blackberry bold 9900 software update 7.1 download
To download and install the update, follow these steps: Official software downloads for the (BlackBerry OS 7