link for download firmware-only firmware no root and cwm,add this later.
http://mobilefirmwaredownload.blogspot.com/2014/04/download-link-of-lg-optimus-l5-stock.html
http://xdaforums.com/showthread.php?t=2716440
http://www.lg-phones.org/cwm-custom-recovery-for-lg-optimus-l5.html
http://www.kingoapp.com/
http://www.mgyun.com/en/GetVRoot