Install rooted ZVB Stock firmware on Sprint LG G3 LS990


In this guide you will be able to install a pre-rooted ZVB firmware on your Sprint LG G3 LS990. The Stock firmware is always un-rooted and you have to bring back your device to stock un-root condition to get access to official firmwares. But what if you could install rooted ZVB Stock firmware on Sprint LG G3 LS 990 with a custom recovery?? Yes it’s possible now, if you don’t want to get through the tiring process of un-rooting your device to install latest firmware then you could follow our guide below to update your Sprint LG G3 LS990 on rooted ZVB firmware using Custom recovery like TWRP or CWM.

The ZVB firmware is already rooted you don’t need any modification to get root access on your LG G3 LS990. Just install the ZVB firmware on your Sprint LG G3 LS990 and get benefits of a rooted firmware. With a rooted firmware you can pefrom multiple things inclduing removing bloatware and overclocking etc. So just go ahaed and install the latest rooted ZVB firmware on your Sprint LG G3 LS990 using Custom recovery

How to install rooted ZVB Stock firmware on your Sprint LG G3 LS990

Disclaimer: This tutorial includes multiple operations which includes, installing Custom ROMs and stock ROMs. Follow the guide on your own risk, we are not responsible if you brick or damage your device however the chances of bricking a device are rare but you have to pay full attention on the complete guide to avoid any issues and difficulties while performing any of the above mentioned operation.


Please ensure your phone battery should be charged at minimum 80%

Download and install latest USB drivers

Your device should have a working CWM or TWRP recovery installed.

Download Android 5.1.1 Lollipop build specified for your LG G3 LS990 from the below provided links

Download rooted ZVB stock firmware

Download Modem for LG G3


Process to install rooted ZVB firmware on your Sprint LG G3 LS990

Turn of your device and boot into CWM custom Recovery menu by the hardware keys combination or using any third party app (Mostly found in Play store).

Once your device enters into CWM recovery, create a Nandroid backup of your device or follow our guide to create a Nandroid backup (this will create a backup of your complete device including current firmware) if something goes wrong you can restore your previous firmware.

Once the Nandroid process completes, navigate and select wipe data/factory reset.(this will erase your data)

Now it’s the time to flash the ZVB Stock firmware on your device. Choose “install zip from sdcard” >> choose zip from sdcard & navigate to the folder in which you have copied the ZVB ROM zip file and select it.

Select “yes” to confirm install, wait for a few minutes till the file is completely installed in your device.

Once done with the above step, now apply the same process with the installation of Modem file.

Wait for the installation process to complete. The first boot up may take 5-7 minutes.

If your device is taking longer then 7-10 minutes then follow this guide to to fix this issue 

You can also: Download and install Android 6.0 Marshmallow Google Now Launcher

That’s it! You have successfully installed rooted ZVB firmware on your Sprint LG G3 LS990. If you have any query feel free to contact us by posting your queries in the below provided comment section. Follow us on Facebook/Twitter/Google+ for future update.

A Software Engineer who loves to hang around latest gadgets and writes his own experiences to get the best possible and accurate information.
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