INSTRUCTIONS To Install CM11 4.4.4 On Lg L90 :-
- Move the GAPPS and ROM for the device;
- Plug it into Recovery Mode (Volume less and power);
- Do wipe data, wipe cache and wipe dalvik (In CWM located in Advanced);
- Go Install zip> Choose sdcard> Choose zip> Yes;
- Repeat the previous step to install the GAPPS;
- Now wipe cache and wipe dalvik.
PROBLEMS CM11 4.4.4 On Lg L90 :-
- Camera is not working.
Source – XDA