For all the good that is rooting, you may want to go back to the way things were. Whatever method you decide to attempt, make sure that you backup your data first.

Unroot with SuperSU

SuperSU allows you to unroot phones by simply going into the app’s settings and selecting the full unroot option. It is a really helpful option.
Open the SuperSU app. Go to Settings, and scroll all the way to the bottom until you see the Full unroot button. Tap it, hit continue, and the unrooting process will begin.

Unroot with Universal Unroot app

There is an app that will do some of the hard work for you. It is called Universal Unroot, and it gets rid of root privileges in most Android devices. But it is not perfect.
Most Samsung devices are not compatible, for starters. And LG devices will be unrooted, but still show as rooted afterwards.

Unroot by flashing stock firmware

One of the most thorough ways to remove root access is by flashing your device with factory firmware. It will wipe your phone or tablet clean of any root traces, but a word of warning: It is not for the faint of heart.

unroot by deleting the files 

that granted the root in the first place. We recommend using a file explorer app like ES File Explorer. Turn on Root explorer under Tools in the ES File Explorer menu and grant it root privileges, if asked.

1. Using Es explorer go to root folder '/'.
2. Go to system > bin, then tap and hold on busybox and su and delete them.
3. Now go to system > xbin, then tap and hold on busybox and su and delete them.
4. Finally, go to system > app and delete superuser.apk.
5. Restart the device and you should be unrooted.

Unroot with OTA update

Sometimes just installing an OTA update will break root. Look for a software update under Settings > About device. Just be careful, as with some root methods it might prove impossible to recover from. In that case, you may need to flash the original firmware first.
None of the root methods or unrooting methods are without risk, so always back up your data, make sure your device is fully charged, read the instructions carefully, and take your time.

One of the easiest ways to root an Android device without PC is by using an app, Apps which are weel know to root an android device are Z4Root, Framaroot, Vroot, KingRoot, CFRoot, Towelroot, Kingo Root, and BaiduRoot. They will root your device in the time it takes you to brush your teeth. But some only support devices running older versions of Android.

Things to do before Rooting

Backing up everything you have on your phone is extremely important.Something could go wrong, and you might need to wipe your phone clean, but that shouldn’t be a problem if you backed everything up since you can easily re-install everything.
You will want to ensure that your device is fully charged before you begin.

Know more about Rooting Pros and Cons

If you didn't check "Unknown Sources" in Settings > Security, then during installation, you will get a prompt "Install blocked", stating that "For security, your phone is set to block installation of apps obtained from unknown sources".
 

Just follow phone instructions and install Kingo Root on your device.

1. Install the Kingo Root APK.
2. Open the Kingo Root app.
3. If your device is compatible, you will see a One Click Root button if your device is compatible. Tap it, and be patient - it can take a while.
4. If the root is successful, you will see a large check mark.

To verify the root

You will need to download an app to make sure your device has been successfully rooted. There are several apps available on the Google Play store that, when downloaded, will tell you if you have super-user permission you have succeeded. Root Checker is a popular one — simply installing and running it will tell you if your phone has super-user permissions.

A custom ROM is basically a custom version of Android, and it truly changes how you use your phone. Some merely bring a stock version of Android to non-stock phones, or later versions of Android to phones that don't have it yet.Some add a few handy features,some add lots of really unique features, and some change your operating system from head to toe. No matter what phone you have Android is great, but sometimes, the version of android you need will not ben released or delayed. For flashing ROM you need root you can check how to root after rooting you truly Own Your Device and you should be able to do with it as you please. Certain manufacturers and carriers try to block some features so that you need to pay for that feature, but with root access, you truly own your device and you can access many features and try any Sure,there's some risk involved, and we don't usually recommend rooting other people's phone.

Advantages for Android Custom ROMs:

• Upgrade your Android version from older to newer.
• Boost your Phone performance.
• Awesome Customization features.
• Try new looks and unreleased features

Custom ROMs are generally of two types: Stock firmware based and AOSP based.
Stock firmware based custom ROMs: These ROMs are a modified version of the stock firmware that your device shipped with. Sometimes, they can also be based on an upcoming leaked firmware that some developer managed to get his hands on. These types of custom ROMs offer the most stability but only have a limited feature set.

• Scrolling screenshot

Rather than taking multiple screenshots you can take a continuous screenshot for example a full WhatsApp conversation can be taking in a single screenshot.
To take a scrolling screenshot: after taking screenshot open it while its previewed and you will find scroll button below and click that. (Note:Scroll option wont work for all) 

• Second Space (One phone and Two accounts)

You can now run two different accounts on the same Mi phone. With Second Space, you can create a whole separate partition within your Mi device, and both accounts will have separate emails, apps, photos and passwords.
Everything on the First Space will be separate from Second Space.
To activate: Go to settings and search for Second Space, then tap it to turn it on and be transferred to the other zone on your smartphone. Switching between spaces will also require a password keep each Space’s user from accessing the other user's data.
To go back to your first zone, simply swipe down on the notification bar, and there should be a floating notification that says First Space. Tap on that, and you will be back in your original zone.

• Dual Apps(Multiple apps in same mobile)

You can now clone your apps to get two Facebook,WhatsApp,Messenger and many more applications you wish on the same smartphone.
This feature is most useful for users, who wish to use two WhatsApp accounts on the same device. If you have multiple Facebook accounts, Dual Apps will be a awesome feature for you to use.
There are third party apps in the Google Play Store like Parallel Space that allow you to do this but none of these apps runs as seamlessly as the one that's built into your Xiaomi device.

To activate: Go to your settings and search Dual Apps. Tap on that, and you will be able to enable it for whichever apps you select.

• Quick Ball (For quick access)

If you are using the Mi Max, you'll know that sometimes it's simply impossible to touch the other end of the screen just by using one hand. So what you might want to do is employ the Quick Ball function This thoughtful feature makes one-handed navigation so much easier.
You can even toggle for it to disappear on the apps which you want, like when watching a movie on a certain app

To activate: Go to settings > Additional settings > Quick Ball. Turn it on, and you will see a translucent ball appear on your screen.

• Child Mode

You don’t have to worry about the data getting deleted, or send messages to others,or calling someone. Just activate Child mode.

Go into Settings, then turn Child mode on and pick only the apps you want the kids to be able to access. When it’s enabled, they’ll only see the selected apps.

• Private Messaging : 

In mi, there is an option of private messaging i.e hidden from general user. when you open your Message app. You can see and read all message. But there is an option of private message also.
Just drag down your message screen. A private message screen will get open. Now tap to Private Messaging Settings, Now you can add your Private Messaging contacts here. You can also set lock to your Private Messages.
Next time when you receive message from these contacts, they will directly moved to your private messages screen and will not appear into your general messaging screen.
To view your private message simply drag down your message screen. Your private message screen will appear.

• Guest Mode:

There is an inbuilt Guest mode option in Redmi, You can enable it from your toggles bar. You can even set password on it. When you enables guest mode all you apps data like contacts, Call Log, messages, Gallery will get hidden. When any user open these apps, they will find it blank.
So it is one of the way to protect your personal data while handling your phone to someone.

• DND (Do not Disturb):

You can enable this mode from the toggles bar. This mode will silent your calls and messages. You can also set time for DND or also schedule it on daily basis. Like if you don’t want that any body disturb you while you sleep. Just click Recurring DND time and set the time. Now everyday this mode will enable at this time and will get off at your scheduled time.There is an option for Repeated Calls, if you receive repeated call from the same number within 3 minutes. Your phone will ring in that case.

•  swipe 3 finger screenshot: 

Now you can directly take your phone screen shots by swiping three fingers on the screen on the screen from top to down direction and also by using Screenshots option in toggle bar. Or you can take Screenshot by pressing Power+ volume Down Key simultaneously.

• Disable Navigation button : 

Enable this option from Toggle menu and all your Navigation keys get disabled.To enable again you can double tap on back button.

• Inbuilt App Locker : 

Now you don’t need to download third party app to lock your apps. You can simply enable lock for the app you want to secure.

• Data Restriction for Individual app: 

You can restrict your data for individual app. you can also decide, which app to use mobile data or WiFi. There are lots of apps like games and for those app you don’t want to waste your data. As most of these apps use your data for ad fetching. So most of your data that goes waste in ads. Now you can restrict those app to use your data.
To use this feature, just Go to Security > Data Usage > Restrict Data usage. Now you can chose to which app you want to give Mobile data or WiFi. Simply by ticking these options for individual apps.

• Blocklist

There is an inbuilt Call and Message Blocker in Redmi. Now you can block the unwanted calls directly. You can add these numbers in Block list. Simply Go to Security app > Blocklist and then tap the setting icon and add the numbers you want to block.

• Power

In Security app there is an power option that let you switch to different mode automatically to save power when Battery is low. Like if battery is only 20% it will switch to Marathon mode and disable your mobile data reduced brightness etc. You can also schedule it when it need to change.
You can also set, How your battery icon will look, Graphical, Percentage and Top Bar. You can select from these three options.

• An In-Built Cleaner, Virus Scanner

Mi comes with an integrated cleaner and virus scanner. Cleaner allows you to clean your smartphone which cleans cache and junk files. Virus Scanner scans your device to keep it clear from the virus. Both these settings can be found under Security app.

• Built-in call recorder

There are many third party call recorder apps on Android app store, but mi comes with built-in call recorder, which can automatically record the incoming and outgoing calls. So need not to download any third party call recorder. While on call you'll get an icon to record a call, just tap to record the conversation.

• One-handed mode

Xiaomi Redmi supports one-hand mode. if you find the mobile is big to use with one hand, then activate the one-handed mode.
To activate go to Settings >> Additional Settings >> One-handed mode.
You can just swipe on navigation panel from home button to back button.

• Customize quick panel

The notification panel features many shortcuts such as Wi-Fi, Bluetooth, data on/off, Screen rotation, and much more. You can arrange these quick settings icon as your preference.
To activate go to Settings > Notifications & status bar > Toggle Positions and drag the icons as your convenience.

• Reading mode

The new Redmi comes with reading mode, that turns the display in a yellow hue for night time to help a user. So that your eyes are not strained while using the mobile.
 To activate: Settings> Display> Reading Mode.

• Mi Remote App to Control Devices Nearby

The Redmi comes with support for IR Blaster. Also, the MIUI has an inbuilt app called 'Mi Remote' with which you can control the devices which are connected to the smartphone. The Mi Remote can be found on the home screen.

• Customize Notification LED

The mi has a LED Notification and with the MIUI 7, you can customize the notification light settings.
For notifications,calls,messages different colours.
The Notification light settings can be found under Settings > Additional Settings > Notification light.

• India and Pakistan have played 4 matches so far in the ICC Champions Trophy  and  both the sides  winning twice each.

• This is India's record fourth Champions Trophy final while it's Pakistan's first.

• India and Pakistan have reached to the final of Champions Trophy together for the first time.

• The ICC estimates that the match will be watched by 324M worldwide.