Download the LG Flash Tool or KDZ Firmware Updater to install the firmware file (.kdz or .zip format). How to Flash Stock Firmware on LG E400
Once you have completed the prerequisites, you can follow these steps:
is experiencing the following, a firmware flash is the ideal solution: The phone stays stuck on the LG logo. Forced Closes: System applications are constantly crashing.
Change the USB port. Use a USB 2.0 port instead of USB 3.0. Reinstall the LG USB drivers. Firmware LG E400 Optimus L3
The firmware scene for the L3 is arguably more famous than the stock software. Developers like Team Optimus L3 and pecanCM ported newer Android versions against all logic.
While you can install TWRP using the Official TWRP App from the Play Store (which requires root access), a more reliable method for the E400 is to flash it using from the Play Store, which can install ClockworkMod (CWM) Recovery , another popular custom recovery.
Use legacy exploits like SuperOneClick or Framaroot on stock Gingerbread. Download the LG Flash Tool or KDZ Firmware
For daily use, stick to stock Gingerbread or CyanogenMod 7. Avoid Android 4.x firmwares; they turn the L3 into an unusable slideshow. And always keep a backup of your EFS partition.
The phone is unresponsive due to software corruption. Custom Firmware vs. Stock Firmware
Click on (retains data but may not fix bootloops) or CSE Flash (performs a complete factory reset, highly recommended). Click Start on the confirmation window. Change the USB port
Flashing custom ROMs allows the E400 to run newer versions of Android, such as Android 4.0.4 (Ice Cream Sandwich) , which were never officially released for this model. How to Install ICS 4.0.4 on LG Optimus L3 E400
Turn off the phone, then press and hold Power + Volume Down + Menu buttons simultaneously. Release when the LG logo appears to enter the reset menu.