Root you phone by iroot tool search it on my blog install custom recovery from flashfy app download it from play store or search on my blog, download zip file from below install it using custom recovery, place the file in sd card toto recovery and install zip from sd card
1. LG VU2 F200L Kitkat 4.4.2 Root Recovery. V30FF200L_Kitkat_Stock_Root_Rec.zip:
Link Fshare: Download
Mirror baidu: Download