How to install recovery twrp/PhilZ/CWN on rooted Locked Bootloader D2303_18.6.A.0.175

anyone?

I have no problem rooting Lollipop 5.1.1

my procedure

1. flash JB using flashtool
2. root then install recovery twrp or Philz or CWN
3. boot to recovery
*4 install zip on your customized rom.zip

*1. download prfcreator
*2. download orig firmware using flashtool
*3. install super su flashable zip
*4. create your own cutomized installer.zip