Follow this process precisely to update or re-flash your Blackberry 9790. Step 1: Install the Firmware

Fixes frequent app crashes, extreme battery drain caused by OS glitches, and sluggish user interface responsiveness. Technical Specifications: BlackBerry Bold 9790

BlackBerry OS updates were historically made available through mobile network carriers (like AT&T, Verizon, China Mobile, Telkomsel). Because the BlackBerry 9790 is a legacy device, you will not find updates through an "update" button in the settings menu.

You need to download the official and the BlackBerry Bold 9790 Stock ROM (OS 7.1) . Locate a trusted firmware repository online to download the updated flash file matching your region or carrier. Step 2: Install the Firmware Package

| Step | Action | |------|--------| | 1 | Charge battery to ≥70% (do not rely on USB power alone) | | 2 | Backup data via BlackBerry Desktop Manager → “Backup” | | 3 | Backup contacts to SIM or cloud (optional) | | 4 | Remove microSD card (prevents corruption) | | 5 | Disable antivirus and firewall temporarily (USB conflicts) | | 6 | On device: Options → Security → Security Wipe (if device boots) |

For users of the classic , keeping your firmware current is essential for fixing bugs, enhancing performance, and accessing the final features released for the platform, such as mobile hotspot and NFC tagging. Latest Official Firmware (OS 7.1) The final official release for the BlackBerry 9790

Resets the device completely, wiping security locks.

The tool will query your device and display a list of available system applications, language packs, and core OS modules. Check the boxes next to the language packs and features you require, then click . Review the configuration summary and click Finish to begin the automated writing process. Do not disconnect the phone until the application displays a success dialogue. Troubleshooting Common Flashing Errors Error 507: No Applications Linked

The Loader tool should display COM-X or USB:UNKNOWN next to the connection prompt.

| Tool | Version | Purpose | |------|---------|---------| | BlackBerry Desktop Manager | 7.1 or 6.1 | Backup & restore | | BlackBerry Virtual Machine (VCM) | N/A | For virtualized OS loading (optional) | | BlackBerry Swiss Army Knife (BBSAK) | 1.9.11 | Advanced wipe and OS load | | BlackBerry Java Loader | Part of RIM SDK | Command-line OS loading | | Device drivers | BlackBerry USB Drivers (latest) | Communication | | Flash file (OS) | .exe or .sfi + .cod | Firmware image | | WinLoader or JL_Cmder | 1.9.2 | Emergency unbrick |

Flashing software updates the OS, not the SIM lock. You need an unlock code for network unlocking.

As soon as the device connects, click . (Note: Some firmware versions require inserting the battery right after clicking next; if the screen stays blank, reinsert the battery now). Step 5: Select Software Packages