What's disadvantage-: When You Install A Custom Rom Then Your Warranty Will No More [Same As Rooting]
What you will get The Benefits?-:
1. Provides the latest and most up-to-date versions of Android
2. Improved performance and efficiency
3. Battery life improvements
4. Removal of bloatware (the useless junk that manufacturers install on your device)
5. Custom themes and modified user interfaces
6. Your friends will think you are awesome for knowing how to install a custom ROM
7. And more!
Ready? Let's Start It-
Rom No. 1-: CyanogenMod
Well This My Favorite Reason? Because It's Give So Much Things To Do On My phone And The Great Thing CyanogenMod Available For Almost Every Phone.
Go To The Official Site
Rom No. 2- Paranoid Android
The Paranoid Android ROM doesn't provide a radical design overhaul, but focuses on a number of simple but effective changes to notifications and navigation.
Immersive mode allows you to view information on screen while hiding system bars, and 'dynamic system bars' blend your status and navigation bar color with the particular app background. It's purely aesthetic, but provides a nice transition.
Go to the Official site
Rom No. 3- Pac-Rom
PAC-ROM touts itself as the all-in-one ROM solution. The team shamelessly cherry picks features from the other ROMs listed on this page, including OmniSwitch and CyanogenMod's Pie controls, and puts them all together in their own package.
It might seem lacking in personality, or overkill, but if you're looking for the most customizable, option-rich ROM, then this is it. And wait until you see the boot animation — the team deserves some points for that alone.
Go To The Official Site
Rom No 4-:OmniROM
OmniROM supports the ability to launch apps by tapping on the time and date in the notifications menu, it can add a notification counter in the status bar to show the number notifications you've received, and has the ability to manage the display brightness just by sliding your finger along the notifications bar.
OmniROM's standout feature, however, is the OmniSwitch shortcut. The OmniSwitch is a quick-menu that you can load with shortcuts and jump from any part of your phone to any app, or vice versa, and it is completely customizable.
Go To The Official Site
Rom No 5-: SlimROMs
SlimROMs made a name for itself by offering a completely stripped down version of Android and letting you determine exactly how much of the Google Play services you want bundled in. Otherwise, SlimROMs is characterized by the ability to modify the DPI of fonts and icons and make everything as tiny as you need it to be. The Slim family currently supports almost 50 devices.
Go To The Official Site