f180k not installing any custom rom

i want to install custom rom in my f180k but can not install. i installed recovery unlocking bootloader with the help of RecoveryLGG4.4.2KitKat but when i install the next recovery like twrp-e975-2.8.7 or philz_touch_6.57.9-e975 it gives me error like "this device is f180" if hardly some time any recovery installed then no rom installs same error. and after changing signature settings mobile dont boot up again and i have to install kdz again and again please someone help me

regards