Post [Guide] Things To Do Before Installing a Custom ROM

Rooting and installing custom ROM offer many advantages indeed but, at the same time it can be a risky as it can cause serious problems to your phone and possibly even brick it.

People brick their phone because they don’t take precautions when installing a custom ROM on their device. If you understand things and go through it carefully, you’ll never be caught into an uncomfortable situation. Here are some important things to be taken into consideration before rooting or installing any custom ROM.

Your device must have Root Access.
If you are not a developer, then you must be thinking What does this Root Access means? Well, When you purchase a Android phone from a manufacturer, it installs its own Custom version of Android OS with some pre-installed applications and locked system-level access to the device so that you couldn’t able to play with the internal system settings.
So, by having Root Access, you can have system level access of your device. You can remove manufacturer’s pre-installed apps, their bloatwares and adwares and many more things. You can do anything with your device. But Remember that the process of rooting your phone is different for different devices. You must google right tutorial for rooting our device because if you do anything wrong, you might end up bricking your device.

Backup your Apps, Contacts, etc.
The first thing that you should do before installing a custom ROM is to backup your applications, data, contacts, messages, etc. By backing up your phone, you won’t lose your important data when something happen during the procedure.

Ensure decent battery level
It is very important to check the battery level before installing a custom ROM or rooting an android device. Because, if your device turned off in the middle of the procedure due to lack of battery, it can cause your phone to brick. So, it is very important to have battery sufficiently charged before you start rooting or installing any custom ROM.

Turn on the USB Debugging mode
USB debugging mode is a mode to facilitate a connection between an Android device and a computer with Android SDK. Before an app like One-click-root can dig into your system and grant the access to your device, USB debugging is necessary to allow that function in the first place. That’s is why, whenever you want to perform such task, it is highly recommended that you turn on the USB Debugging mode from ‘Developer Options’ under Settings of your device.
On Android phones, the Developer Options are hidden by default and it can only be accessed by tapping 7 times on ‘Build Version’ from Settings -> About.

Flash A Custom Recovery
If you've dealt with recovery software on your computer any, you probably already have a good idea of how this works and what it's all about. Out of the box, your phone comes with stock recovery software. It varies depending on the manufacturer, but all stock recoveries are essentially the same. They allow you to manually flash official updates and allow you to clear the cache on your phone. What they can do is very limited and in reality, not all that helpful.
Thanks to the genius Android developers out there, we have custom recoveries that replace the limited, unhelpful ones. These third-party, or aftermarket, recoveries add all sorts of functionality to the recovery software on your phone.

Backup your current ROM
Being able to install a custom ROM on your Android phone means that you have installed custom recovery like ClockworkMod or TWRP on your Android device. Well, having a custom recovery on any phone is a great advantage. It can perform all tasks done by stock recovery while adding lots of other useful options.
One such great feature is its ability to backup the whole ROM, custom or stock, on your phone’s internal or external storage. You can back as many ROMs as your phone’s storage can afford. I strongly recommend that you always keep a backup of your phone’s original/stock ROM. Before you install a new custom ROM, always create a backup of your current ROM. Scroll down to the “backup and restore” option and backup the ROM to the internal or external storage of you device. If you select “backup”, the ROM will be saved to internal storage. To save it to external SD card, select “backup to external sdcard” option.

All backed up ROMs are saved on a folder called “clockworkmod” on your device’s internal or external SD card, depending on what location you chose while creating the backup.

It’s is always better to store the backed up ROM on the external storage because sometimes the phone is caught in a bootloop, or the screen goes into a frozen state, or you may experience lags, or anything, and decide to reset/wipe your phone to get it back to normal. In doing so, all data stored on the internal storage is deleted. In certain situations you might have the opportunity to backup your data but in some cases you might not be able to do that.

If you’ve rooted your phone, it is recommended that before installing a custom ROM on your phone, you must back up your current ROM, whether it is stock or custom ROM. So that if you experience some lag or any other situation you don’t like after flashing a custom ROM, you can restore the phone to its original state with a Custom Recovery.

Backup Your Phone’s IMEI
Sometimes, when you install a custom ROM, your IMEI number will be lost and as a result you will not be able to receive proper network signal. To avoid such situations, do not forget to backup a folder called ‘efs’ that stores your IMEI number.
To access the folder, you have to install a root file explorer app like Root Explorer, X-plore File Manager, etc. Once installed, open the app and find the folder. You will easily find it as it is located on the root directory of your device. When you located the folder, just copy the entire folder and paste it on your external SD card. It will be even better if you copy it to your computer too. After installing the custom ROM, just copy and paste the folder in the same location where it was.

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Prevention is better than Cure

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