[Q] Root htc one m7 with software number 6.09.401.11 topic

my device htc one m7 with sense 6.0 software number 6.09.401.11 with htc sdk api level 6.25 how i can root my phone ? all off root applicaiton dosent work on my device (kingo root )
how i can root my device with out unlock boot loader and factori reset
pls suggest e way too easy rooting method