If you're done with ROOTING and flashing your CUSTOM RECOVERY ( Clockworkmod , TWRP , Etc. ) then you can install your CUSTOM ROM. if not CHECK THIS LINK .
Things you need to do.
- Back up your EFS this is very important. ( incase of losing IMEI before flashing ).
- Make sure to check that the ROM you have downloaded is compatible with your device.
check the ff:
1. Brand of your Phone
2. Model, ex. Samsung, Sony, LG, etc.
3. Model Number or Model Code. ex. Samsung S4 i9505 , LG G2 D802.
4. Capacity of your device. ex. LG G2 16gb. because some custom ROM require this.
- Download the STOCK ROM for your device ( incase of bootloop and other issues ).
- Back up your Current ROM.
- Back up imporant files. you can use "titanum back up" application which you can find in Google Play.
- Save it to your PC or USB etc.
- Done .