If your phone continuously restarts at the BlackBerry splash screen.

Leave the phone on a wall charger for 2 hours; if it fails to boot, source a different autoloader build version. Life with BlackBerry OS 7.1 Today

Follow these instructions exactly to safely flash your BlackBerry Bold 9900. Step 1: Download the Correct Autoloader File

The BlackBerry Bold 9900 remains one of the most iconic smartphones ever created. Released in 2011, it represented the pinnacle of BlackBerry’s physical QWERTY keyboard design, paired with a premium stainless steel frame and a sharp touchscreen.

: Designed for Windows PCs to communicate with the BlackBerry Bold 9900 (often codenamed Dakota) via USB. Usage Process Preparation : Install necessary drivers, often by installing BlackBerry Desktop Software