Step 1. Visit: google.com/android/devicemanager, on your computer or any other mobile phone
Step 2. Sign in with the help of your Google login details that you had used in your locked phone as well.
Step 3. In the ADM interface, choose the device you want to unlock and then select “Lock”.
Step 4. Enter a temporary password and click on “Lock” again.
Step 5. If the earlier step was a successful one, you will be able to see a confirmation below the box with the buttons – Ring, Lock and Erase.
Step 6. You will now be able to see a password field on your phone screen. Enter the temporary password to unlock your phone.
Step 7. Visit your phone’s lock screen settings and disable the temporary password.
That’s it!! The Android Device Manager has successfully unlocked your phone.
Now that we’ve covered the steps to unlock your phone, let’s look into details how to enable Android Device Manager on your phone:
On a technical level, any phone running Android 4.4 KitKat and above is considered to be compatible with ADM, but it does not work by default since you will have to make some initial alterations in order to use it. In other words, you first need to enable the ADM, if you have not done it earlier. This can be achieved by the steps given below:
Turn on Location Access: Go to Settings > Location, then turning on the toggle. Ensure that you choose ‘high’ accuracy, as this is considered to be the best for finding your phone’s location in an accurate manner.
Enable Security Settings: Go to Settings > Google > Security and turn on the ‘Remotely locate this device’ option. This permits the ADM to view your phone’s location. Following this, you will have to activate the “Allow remove lock and erase” option. This is extremely useful in case you want to wipe your phone completely or lose your phone.
Activate the Manager: Go to https://www.google.com/android/devicemanager. Using your Google credentials, log in to your account and test it, by trying the location feature.