Updating the firmware on an LG P970 Optimus Black typically involves using the flashing method, as official over-the-air (OTA) update servers for older LG mobile devices have largely been decommissioned. Prerequisites & Preparation
These require a custom recovery like ClockworkMod (CWM) to be installed first. Troubleshooting Common Issues firmware+change+update+on+lg+p970+optimus+black
You may find unofficial "KDZ" firmware files for Android 4.0 and use a tool like KDZ Updater, although this method is less reliable now. Summary of Software States: Official: Android 4.0.4 (ICS) - Stable, outdated apps. Custom: Android 4.4.4 (KitKat) - Possible bugs. To narrow down the best approach, let me know: Are you currently running the official Android 4.0.4 ? Is the device already rooted ? KDZ Updating the firmware on an LG P970
CM11_P970.zip) and GApps.zip to the phone’s internal storage.LG P970: Upgrading to Android 4.0.4 and Rooting - Hypn.za.net For Speed (Android 2