Note: Backup your data before you proceed!
Custom ROMs are one of the best things about Android as they give you privileges that cannot be over emphasised like improved battery, better performance and updates to the latest Android versions, just follow this guide to install your custom ROM.
— Device must be rooted
— Unlocked Bootloader
— Custom Recovery
— Android device
— Google App (Gapps)
— Custom ROM
Download the ROM for your device
Find a ROM for your device, using the appropriate XDA forum.
Make sure to go through reputable websites that allow users to download custom ROM according to the specification of the android device. Many phones have several variants. Some phone models have more versions than I have friends and all require different ROMs based on the carrier they come on. So make sure you are getting the correct ROM, by verifying that it’s compatible with your phone model.
The .zip file is going to be around 500mb to 1.5Gb. Do not extract it! Then find the corresponding GApps. If you are installing a ROM running on 4.4.2, you’ll want a GApps package for 4.4.2. Save your ROM and GApps to your SD card, internal storage, or flash drive.
Boot Into Recovery
To boot into recovery use your recovery combo buttons. On most devices it is Hold Vol Down + Power for 5 seconds. Once you are in recovery, you should see something like this…
This is TWRP! Woot!
And this is ClockworkMod! Double woot!
Now go ahead and select “Install”…
Install on TWRP
Install in ClockworkMod
Once you have selected your ROM file. Proceed to flash the zip…
Apply update in TWRP
Apply update in ClockworkMod
Flash the file with TWRP
Flash the file with ClockworkMod
After the install is complete, back out and clear your cache…
Wipe with ClockworkMod
While this is the most common way to flash a ROM, there are many different ways specific to each device. I’ll list a few of the most common pieces of software that will allow you to flash a ROM from your computer. These are better to use when you’re flashing the stock ROM back onto your device.
Reboot the device
Lastly, you need to reboot the device with the help of the third party custom recovery and thereby improve its performance.
Make sure to follow all the steps in a proper manner. Check your phone compatibility with ROM and Recovery. If you still find this job to be stressful, make sure to contact a professional person who has lots of experience in this field.
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