Model number must match exactly, and never downgrade past the Anti-Rollback version. Follow this guide, and you’ll be able to keep your LG phone running smoothly for years to come.
Click "Start" and wait. Do not disconnect the phone during the process. The phone will reboot when finished. Important Considerations for 2026 kdz firmware file for lg phone new
Click the "BIN file" section and browse for your downloaded .kdz . Choose the Process: UPGRADE: Keeps your data but may cause bugs. Model number must match exactly, and never downgrade
LGUP refuses to flash, saying "Antirollback version is lower than device." Cause: You are trying to flash an older KDZ (even if "new" to you) onto a device that has already received a higher antirollback index via OTA. Fix: You cannot downgrade. You must find an even newer KDZ or the exact same ARB version. Check your current ARB using fastboot getvar all . Do not disconnect the phone during the process
: You can enter your phone's IMEI to check for specific firmware details and potential download links for the most recent software your device can support. LG Official Support
Since LG exited the smartphone business (2021), official direct downloads are limited. Trusted sources for new KDZ files include: