Mastering Android Device Manager The Ultimate Guide to Unlocking Your Samsung Galaxy A15 4G Device

Mastering Android Device Manager The Ultimate Guide to Unlocking Your Samsung Galaxy A15 4G Device

Peter Lv13

Mastering Android Device Manager: The Ultimate Guide to Unlocking Your Samsung Galaxy A15 4G Device

So, what is Android Device Manager?  Android has this amazing native tool to help you locate and remote wipe your lost or stolen phone. We lock our phones via passwords or patterns or fingerprints to maintain the security but what if someone dares to meddle with your phone or unfortunately, it gets stolen? Don’t worry, all you need to do is let Android Device Manager unlock your Android phone. For this, it just needs to be enabled on your phone (before you unluckily locked yourself out of it). Android Device Manager unlocks your phone in a small amount of time, saving you from all the troubles.

In addition to this, the Android Device Manager also unlocks your password/pin-encrypted phone if you have forgotten the passcode by chance. The procedure is quite simple; all you need is a Google account to set this up onyour phone and then you can make use of any other online device to track down your lost or stolen phone or to even wipe all data in it. Phew!

how to use android device manager

Using the Android Device Manager to track a lost phone

Part 1: What is Android Device Manager lock?

Android Device Manager is Google’s take on Apple’s Find My iPhone. Enabling the ADM is quite easy; just go to google.com/android/devicemanager  on your computer and search through your list of devices that are already connected to your Google account. Once you are there, you can easily send a notification to the phone you want to enable remote password application and wiping upon.

ADM comes with a set of features that helps you to unlock your Android phone as well. It not only helps you to find your device, but also Ring it, lock it, and wipe and erase all the data as well, if your phone is lost or stolen. Once you’re logged into the ADM website from your computer, you can avail all these options once your phone is located. It is a wise option to get your device locked by Android Device Manager in case it is lost or stolen, so that your phone is secured.

Android Device Manager can unlock your phone under a specific set of circumstances only.

  • • First of all, Android Device Manager needs to be enabled on your phone before it is lost, stolen, etc.
  • • Secondly, your phone can only be tracked by ADM if the GPS option is switched on.
  • • Thirdly, the Samsung Galaxy A15 4G device you are using for ADM, must be connected to Wi-Fi or internet, to login to your Google account.
  • • Lastly, Android Device Manager is not compatible for all Android versions. For now, it is only compatible with devices running Android 4.4 and above, so your phone must be in this category for ADM to work.

Part 2: How to unlock Android phone with Android Device Manager?

Just act according to the following steps, and the Android Device Manager will unlock your phone.

1. On your computer or any other mobile phone, visit: google.com/android/devicemanager

2. Then, sign in with the help of your Google login details that you had used in your locked phone as well.

3. In the ADM interface, choose the Samsung Galaxy A15 4G device you want to unlock. Now, select “Lock”.

4. Enter a temporary password. Now go ahead and click on “Lock” again.

5. If the previous step was successful, you should be seeing a confirmation below the box with the buttons – Ring, Lock and Erase.

6. Now, you should see a password field on your phone screen. Enter a temporary password to unlock your phone.

7. Visit your phone’s lock screen settings and disable the temporary password.

unlock with android device manager

The Android Device Manager has successfully unlocked your phone!

A downside to this process, is an error message faced by some users while using ADM. Many users have reported the issue, that when they have tried using ADM to unlock their locked device, an error message has occurred, saying, “since Google has verified that a screen lock is already set”. Basically, this error message conveys that you will not be able to unlock your phone using Android Device Manager, and this is a flaw on Google’s part, not your phone’s.

Part 3: What to do if phone is locked by Android Device Manager

There are 2 situations where you would want to know how to unlock the Android Device Manager lock – one, when you have unfortunately forgotten the screen lock passcode and the other is when your phone is locked by Android Device Manager.

ADM is built to completely lock your device so that unknown people cannot access it. So, if your phone is locked by Android Device Manager, you might be in a problem.While ADM is a wonderful tool to lock your phone or erase and wipe data if its stolen or lost, most of the users have reported the issue that they cannot unlock their phones that are locked by Android Device Manager. A possible solution to this is adding a temporary password via Google login and bypassing the ADM lock. Or, you can try resetting the password again by entering a new password via ADM. If that does not work, you can make use of several third-party applications which can be found in the internet, that will help to completely erase the Android Device Manager lock.

So, now you know how to unlock the Android Device Manager lock. Do keep in mind, your device must be connected to internet or Wi-Fi, to login to your Google account.

Part 4: Unlock Android devices with Dr.Fone - Screen Unlock (Android)

As mentioned before, many were unable to unlock their phones with ADM. This is why we use the Dr.Fone - Screen Unlock (Android) . It is hassle-free and easy-to-use; the Dr.Fone toolkit needs to be downloaded on your computer and with a few easy steps, it erases any kind of lock-screen passcode and avoids any kind of data loss as well!

Dr.Fone - Android Lock Screen Removal

Remove 4 Types of Android Screen Lock without Data Loss

  • It can remove 4 screen lock types - pattern, PIN, password & fingerprints.
  • Only remove the lock screen, no data loss at all.
  • No tech knowledge asked, everybody can handle it.
  • Work for Samsung Galaxy S/Note/Tab series, and LG G2, G3, G4, etc.

3,224,627 people have downloaded it

This tool works on removing all four types of lock-screen passcodes – PINs, Patterns, Fingerprints, and Passwords. Anyone can use this tool following these easy steps:

You can also use this tool to bypass the locked screen beyond Samsung and LG.Things you should pay attention is that it will remove all the data after finishing unloking on other brand android phone.

1. Fire up the Dr.Fone toolkit for Android on your computer and select the Screen Unlock among all the other tools.

Dr.Fone home

2. Now, connect your Android device to the computer and select phone model in the list on the program.

select model in the list

3. Boot your phone into Download mode:

  • • Power off your Android phone.
  • • Press and hold the volume down+the home button + the power button at the same time.
  • • Press the volume up button to enter Download Mode.

boot in download mode

4. After you get your phone into the Download mode, it will start downloading a recovery package. Wait for this to be completed.

download recovery package

5. When the recovery package download is completed, Dr.Fone toolkit will begin removing the screen lock. This process will not cause any data loss on your Android device, so do not worry. Once the whole procedure is over, you can easily access your Android phone without entering any kind of password. Hurrah!

unlock android phone successfully

The Dr.Fone software is currently compatible with Samsung Galaxy S/Note/Tab series, and LG G2/G3/G4 series. For windows, it is compatible with 10/8.1/8/7/XP/Vista.

The Android Device Manager is an excellent initiative taken by Google to give people the chance to not lose any data and regain access to their phones. This also teaches us to take precautions before such unfortunate incidents take place. Phones are probably one of the most important belongings of ours, in which we confide all our private and confidential documents that we wouldn’t want to be meddled with.

So, make use of this guide and get back command over your Android phone.

How to Lock Apps on Samsung Galaxy A15 4G to Protect Your Individual Information

If you are not a fan of having to go through the process of getting through a pattern or password every time you want to use your phone, the good news is that you don’t have to. There are really just a few Apps on your Android device that have sensitive information you don’t want others getting access to. It would really be great if you could lock those apps individually as opposed to locking the Samsung Galaxy A15 4G device as a whole.

Well, in light of helping you out, this article will address just how you can lock Apps on your device and not have to type in a code every time you want to use the Samsung Galaxy A15 4G device.

Part 1. Why you need to Lock Apps on Android?

Before we get down to the business of locking some of your Apps, let’s look at some of the reasons why you would want to lock certain apps.

  • You may simply want better access on your device. Locking certain apps will allow you to easily access the Samsung Galaxy A15 4G device and use it without having to remember passwords and patterns.
  • If you are a person who is not good at remembering passwords or patterns, simply locking certain apps will help you not get locked out of your entire device which can cause a lot of problems.
  • If your device is used by more than one person, locking certain apps will keep the other users out of information you would rather they didn’t access.
  • If you have children, you can eliminate the many accidental in-app purchases by locking the apps your children shouldn’t be on.
  • Locking apps is also a good way to keep children from content they shouldn’t be accessing.

Part 2. How to Lock Apps in Android

There is always a good reason to Lock Apps on your device and we have two easy and effective methods you can use to do this. Choose the one that you are most comfortable with.

Method One: Using Smart App Protector

Smart App Protector is a freeware that allows you to lock specified applications.

Step 1: Download and Install Smart App Protector from the Google Play Store and Launch it. You may be required to install a helper application for Smart App Protector. This helper will ensure that the many App services running on your device will not be killed by third party apps.

Step 2: The default password 7777 but you can change this in the Password & Pattern Settings.

lock app on android

Step 3: The next step is to add apps to the Smart App Protector. Open the Running Tab on Smart Protector and tap on the “Add” button.

lock app on android

Step 3: Next, select the apps you would like to protect from the pop up list. Tap on the “Add” button once you have chosen your Apps.

lock app on android

Step 4: Now close the app and the Apps chosen will now be password protected.

lock app on android

Method 2: Using Hexlock

Step 1: Download Hexlock from the Google Play Store. Once it is installed, open it. You will be required to enter a pattern or PIN. This is the lock code that you will use every time you open the app.

lock app on android

Step 2: Once the PIN or Password is set, you are now ready to lock apps. You can create multiple lists of Apps to be locked ba_x_sed on your different needs. As an example, we have chosen the Work panel. Tap on “Start Locking Apps” to start.

lock app on android

Step 3: You will see a list of Apps to choose from.  Choose the Apps you wish to lock and then Tap the down arrow in the upper left when you are done.

lock app on android

You can then Swipe to the left to move to other lists such as “Home” and proceed to lock apps in this group as well.

Part 3. 6 Private Apps that you should lock on your Android

There are certain apps that may require to be locked more than others. Of course the choice of which apps you should lock will depend on your own uses and preferences. The following are some of the apps you would like to lock for one reason or another.

1. The Messaging App

This is the application that allows you to send and receive messages. You may want to lock this app if you use your device to send messages of a sensitive nature that you would rather keep private. You may also want to lock this app if your device is used by more than one person and you don’t want other users reading your messages.

lock app on android

2. Email App

Most people use individual email applications such as Yahoo Mail App or Gmail. This is another critical one if you are going to protect your work emails. You may want to lock the email app if your work emails are sensitive in nature and contain information that is not for all individuals.

lock app on android

3. Google Play Services

This is the application that allows you to download and install applications to your device. You may want to lock this one if you are trying to prevent other users from downloading and installing further apps to your device. This is especially valuable if your device is utilized by children.

lock app on android

The Gallery app displays all the images on your device. The main reason you may want to lock the Gallery app may be because you have sensitive images that are not suitable for all viewers. Again this is ideal if children make use of your device and you have images that you would rather they didn’t see.

lock app on android

5. Music Pla_x_yer App

This is the Application that you use to play the music on your device. You may want to lock it if you don’t want anyone else making changes to your saved audio files and playlists or don’t want someone listening to your audio files.

lock app on android

6. File Manager App

This is the App that displays all of the files that are saved on your device. It is the ultimate app to lock if you have sensitive information on your device that you would rather not share. Locking this app will ensure that all of the files on your device will remain safe from prying eyes.

lock app on android

Having the ability to lock your Apps is an easy way to keep information out of the limelight. It also allows you to take full control of your device. Try it, it might just be freeing as opposed to locking your entire device.

Mastering Lock Screen Settings: How to Enable and Disable on Samsung Galaxy A15 4G

In the modern world, the use of smartphones has become such a common trend that everyone would feel abnormal if they don’t have a smartphone of their own. So big the demand is that all IT companies are trying their best to introduce as well as innovate several excellent brands of smartphones. To support the function of smartphones, by far there have been numerous operating systems existed. Among them, Android is one of the most popular as well as trustworthy OS.

Just like any other smartphone, all Android devices have their ways to protect the data stored inside a smartphone from being corrupted or leaked. One of the simplest and most easy-to-use ways is to make use of the lock screen.

The lock screen has proved to be a traditional yet efficient way to help you protect your Android phones. In this article, we will provide you with an informative piece of writing about everything you need to know when it comes to the Android lock screen, and ways to enable and disable it.

If you have spent time searching and looking for features of your Android devices, you will find the process of enabling a lock screen is a piece of cake.

· Step 1: On the main screen of your Android devices, tap on the gear icon - which is the icon representing the Settings menu. Once you have chosen it, you will see a drop-down menu on the screen. In the options provided, tap on the Security bar.

disable lock screen android

· Step 2: Under the tab whose heading is entitled Screen Security, tap on the first bar in the list called Screen lock.

disable lock screen android

· Step 3: Once the step is done successfully, Android will give you plenty of choices about ways to lock your Android devices’ screens. Among these ways, select one particular type which you feel is most convenient as well as free-risk. After that, type in your PIN code to confirm the choice and finally activate your lock screen feature as you wish.

disable lock screen android

disable lock screen android

Part 2: How to Disable Android Lock Screen

To certain customers, the lock screen can do more harm than good, and they would prefer to disable the screen lock on their Android devices. This process is also an easy one to follow, as long as you still hold good memory of the security code.

· Step 1: On the main screen of your Android devices, tap on the gear icon. It will directly lead you to the Settings menu of the phone. After that, a drop-down menu will appear with several choices and bars. Among them, tap on the Security option to begin your work.

disable lock screen android

· Step 2: Under the heading called Screen Security heading, you will be shown 3 choices. Tap on the first one, which is entitled Screen lock.

disable lock screen android

· Step 3: Once you have done the previous step, a brand new screen will appear and then you will be asked to fill in your PIN code. This is a step that helps guarantee that you are the true owner of the Android device.

disable lock screen android

Step 4: As soon as you have confirmed the right PIN code in the bar provided, you will then be presented to the next drop-down menu. A similar screen will appear which shows you plenty of choices. Tap on the top of that list, which is a bar called None.

disable lock screen android

Step 5: In the end, you have successfully disabled the screen lock on your Android devices. You are now capable of using it without any hesitation about the screen lock.

Part 3: Common Problems of Disabling Lock Screen

The process to disable the screen lock on Android may seem easy to handle as well as straightforward to several customers, but there are still some annoying problems that users have to deal with while trying to disable the lock screen.

What are the top 2 common problems?

Below are the two most common problems faced by Android users during their efforts to disable the feature of screen lock.

1. In the Screen Security choice, the None bar can not be chosen.

Description of the problem: There is a sentence below it stated: “Disabled by administrators, encryption policy or credential storage”. All the space of the None option is in white and grey.

The solution to this problem is quite simple. Once you have made sure you are suffering from this nasty one, try to follow these below pieces of advice to see if it is capable of giving you a hand.

Step 1: Open the Settings menu from the main screen. Then tap on the Credential Storage. You will see a drop-down menu like the screenshot below.

disable lock screen android

Step 2: Continue to tap on the Clear Credentials (Remove all certificates) option. Then next click on the OK button. Wait for some seconds until your Android device has finished the process.

Step 3: To make sure that the previous step has been performed successfully, try looking at the bottom of the drop-down menu. If the Clear Credentials (Remove all certificates) are grey out and can not be selected, then you have managed to do it.

disable lock screen android

Step 4: Now that the problem is solved, you can feel free to turn back to your Screen lock option in the beginning and disable the feature of locking screen Android as usual.

2. You have mistakenly encrypted your SD card. You want to disable the encryption, only to realize that it requires you to set a new screen lock code. But when you come to the Screen lock menu, all the options but Password have been greyed out.

disable lock screen androiddisable lock screen android

This is pretty weird, but actually, it is one of the most common troubles that many users have complained about. But to your surprise, the solution is very simple and easy. All you have to do is to reset your password, but with a little change. Your password MUST include at least ONE NUMBER in it. Confirm your new password then you will be able to disable the lock screen Android as usual.

Bonus Tip: Remove Android Screen Lock If Forgotten Password/Pattern

As much as the lock screen can protect the personal information on the phone, it can also cause much trouble if you forget the lock screen password or enter the wrong password too many times. So here comes the need for phone unlocking software . One of the best is Dr.Fone - Screen Unlock (Android), which can help us bypass forgotten Android screen locks without any data loss(limited to Samsung and LG series phones). Other Android brand phones will be wiped out all the data once starting to unlock with Dr.Fone

Dr.Fone - Screen Unlock (Android)

Remove 4 Types of Android Screen Lock without Data Loss

  • It can remove 4 screen lock types - pattern, PIN, password & fingerprints.
  • One-time payment for unlimited use of multiple devices within a specified time period.
  • Work for Samsung Galaxy S/Note/Tab series, LG G2/G3/G4, etc.
  • Besides, unlocking the screen lock, it also works best to unlock the Samsung FRP lock in devices with Android 5.0 and higher.

3981454 people have downloaded it

Steps on How to Unlock Forgotten Password in Android Phones

Step 1: Launch Dr.Fone and click on Screen Unlock from the primary window.

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disable lock screen android

Step 2: Connect your Android device to the computer via USB cable. The program will recognize the phone directly. Select the phone model or “I can’t find my device model from the list above” to continue.

disable android lock screen

Step 3: Follow the instruction on the program exactly to set the phone to Download Mode. First, you will need to Power off your Phone. Secondly, Press on Volume Down, Home button, and Power button simultaneously. Thirdly press the Volume up button to navigate until the phone enters Download mode.

remove android lock screen

Step 4: After you set the phone to Download mode, it will begin to download the recovery package. When the recovery package is downloaded successfully, the lock screen on your Samsung Galaxy A15 4G devicewill be removed. You won’t lose any data during the whole process.

remove android lock screen


  • Title: Mastering Android Device Manager The Ultimate Guide to Unlocking Your Samsung Galaxy A15 4G Device
  • Author: Peter
  • Created at : 2024-07-16 10:19:27
  • Updated at : 2024-07-17 10:19:27
  • Link: https://android-unlock.techidaily.com/mastering-android-device-manager-the-ultimate-guide-to-unlocking-your-samsung-galaxy-a15-4g-device-by-drfone-android/
  • License: This work is licensed under CC BY-NC-SA 4.0.