Unlock android phone forgot password (Official)

Every Android smartphone owner is setting up lock screen security on their device so that others can’t access it so that You can choose a pattern, password, or PIN. Many devices also now support fingerprint scanners, which you’ll use most of the time, but even those will prompt you for your backup PIN or password from time to time, such as after a restart or when you try to change security settings.

If You forget your PIN, Password or Pattern !
If you don't want to loose your data !!
If you find an official way to unlock your phone !!
Here is the Solutions !!!

Unlock your Android lock screen with your Google Login (only Android 4.4 and below).

If your phone is running with Android Lollipop (5.0), then there’s a faster way to unlock a lock screen pattern.

1. Enter a wrong lock screen pattern five times (shouldn’t be hard if you don’t remember the correct one)
2. Select ‘Forgot Pattern’
3. Now you should be able to enter a backup PIN or your Google account login.
4. Enter either your backup PIN or your Google login.
5. Your phone should now be unlocked.

Unlock using Android Device Manager (ADM).

This method only applied to devices that have Android Device Manager enabled.

1. On a computer or other mobile phone, visit: google.com/android/devicemanager
2. Sign in using your Google login details that you also used on your locked phone.
3. In the ADM interface, select the device you need to unlock (if it isn’t already selected).
4. Select ‘Lock’
5. In the appearing window, enter a temporary password. You don’t have to enter a recovery message. Now click ‘Lock’ again.
6. If it was successful, you should see a confirmation below the box with the buttons Ring, Lock and Erase.
7. On your phone you should now see a password field in which you should enter the temporary password. This should unlock your phone.
8. Now, before you go on with your life, go to your phone’s lock screen settings and disable the temporary password.
9. That’s it!

Samsung phone’s lock screen using its Find My Mobile tool.

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This is an easy way to unlock your Samsung device if you created a Samsung account and registered it beforehand.

1. Go to Samsung Find My Mobile.
2. Sign in using your Samsung login details.
3. In the Find My Mobile account interface you should see your registered phone on the left hand side. This tells you that you’re phone is registered to that account.
4. On the left sidebar, select ‘Unlock my screen’.
5. Now select ‘Unlock’ and wait for a few seconds for the process to finish.
6. You should get a notification window telling you that your screen is unlocked.
7. That’s it. Your phone should be unlocked.

Xiaomi  mi Phone’s lock screen using its Official website.

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1. go to the site i.mi.com.
2. login to your Mi account. 
3. (Warning: this site in Chinese, but you can enable automatic translation in your browser - everything will be much clearer.)
4. Click on the rightmost label "Find device".
5. In the menu choose between Google Maps and BaiDu(If your smartphone will be connected to the Internet and GPS, you can easily find it on a map).
6. Click lock your device Button(In the right corner of the map will be displayed your phone, there will be available a few buttons).
7. That’s it. Your phone should be unlocked.

These are the official methods to unlock your Android phone applied for only educational purposes.When you set up a new lock screen PIN or pattern. Make sure to write down the numbers or pattern on a piece of paper or in a text file on your computer to avoid that Problem the next time. If you run into any problems using these methods above, leave a comment.