How to Fix Android App Not Installed Error on Vivo X Flip Quickly?

App not installed on Android is no more an unknown Error Code during Application installation as many people experience it on a day-to-day basis. An “Application not installed” error message usually pops up when you are trying to download and install an App with a .apk file extension from somewhere other than the Google Play Store. The error is very confusing at first but makes sense when you realize that this unknown Error Code during Application installation is neither a software issue nor a hardware problem. It is a direct outcome of what you do with your device. Yes, you heard that right. Your faulty actions can cause Android App not installed error.

What to do when trying to install the Android APK it says “app not installed”? It is terrible that you can’t install App on your device. But in this article, you will know more about the causes behind this error and the best ways to fix it, read on, here is all you need to know.

Part 1: Common reasons for the “Android App not installed” error

You may ask: Why can’t I download apps on my Vivo X Flip? Understanding the underlying causes of the “Android App Not Installed” error is crucial for resolving the issue effectively. So, what are the reasons for Android App not installed error? Given below are a few reasons:

1. Insufficient storage

Android software and if data such as photos, videos, music, messages, apps, contacts, emails, etc are stored in the internal memory there is not adequate storage left for another App, leading to Android App not installed error.

2. Corrupted/Contaminated App file

When you do not download Apps from the Play Store and choose another platform to do so, App files are usually corrupted and hence cannot be installed on your device smoothly. You should be doubly sure of the source from where you download an App, check its extension name, and make an effort not to install contained files.

3. SD Card not mounted in the Vivo X Flip device

At times your phone could be connected to your PC or another electronic device that can access the SD Card from your device. In such situations when you install an App and choose to save it to your SD Card, you will see Android App not installed error because the App cannot find the SD card as it is not mounted in your device.

4. Storage location

You must be aware that certain Apps work their best when stored in the Vivo X Flip device’s internal memory, whereas others need to be located on an SD Card. If you do not save the App in an appropriate location, you will find that the App isn’t installed because of an unknown Error Code.

5. Corrupt storage

Corrupted storage, especially a corrupted SD Card, is known to cause the Android App isn’t installed error. Even the internal storage can get clogged due to unnecessary and unwanted data, some of which might contain an element that disturbs the storage location. Take this issue seriously as a corrupted SD Card and even clogged up internal memory can put your device in danger.

6. Application Permission

Software operations running in the background and App Permission are not new concepts. Such errors can also cause the Unknown Error Code during App installation.

7. Incorrect file

If you already have an App installed but download another variant of it having a distinct signed or unsigned certificate can also make the Android App not installed error pop-up. This sounds technical, but this and all the other reasons listed above can be tackled by you.

The Unknown Error Code during Application installation can occur due to any one or more of the reasons stated above. So read them carefully and understand them well to avoid such glitches in the future.

Part 2: One-click to fix App not installed on Android error

So App not installed on your Vivo X Flip or tablet? The most horrible part is that this issue may come out of the corruption in the system files. In this situation, Android apps won’t be installed no matter what measures you take. Android system repair is the only effective solution to deal with this issue.

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Note: Getting your Android system repaired may erase the existing device data. It is recommended that you should back up your Android data before starting the Android repair.

The following steps illustrate how to fix the “Android App not installed” error in one click:

Install Dr.Fone on your Windows. After that, launch it, and click “System Repair”. Connect your Android to the computer.

Select the “Android” option and click “Start”.

Select device information, such as brand, name, model, country, etc., from each field, and type “Next”.

Follow the on-screen instructions to boot your Android in download mode, and allow the tool to download the firmware to your device.

After the firmware is downloaded, the tool will start to repair your Android, hereby fixing the “Android App not installed” error.

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Part 3: How to fix App not installed error on Android

We understand that it can be a tricky situation to be in when Android App not installed error pops up, but what if we tell you can get rid of it in easy and simple steps? Yes, there is!

#1. Delete unnecessary files/Apps

Insufficient storage can prevent the app from being installed. Make some storage space on your device by cleaning unwanted data and deleting extra media and other files. You can also get rid of heavy Apps by:

Visiting “Settings” on your device. Then select “Manage apps”, “Application Manager” or “Apps” (varies based on device model or version) from the list of options before you.

Now select the App you wish to uninstall and wait for the App Info screen to open, then click on “Uninstall” as shown in the screenshot.

You can also uninstall the unnecessary application on the home screen, just long-press the app you want to uninstall until you see the “uninstall” icon. Click “Uninstall”, then, you need to click “OK” to confirm the uninstall process.

#2. Use only Google Play Store

As you are all aware, the Play Store is specially designed for Android software and contains only trusted and safe Apps. It is often known as the “Android Market” because it is loaded with different types of Apps to stiffly all your needs so that you don’t have to rely on other third-party sources to purchase/install Apps.

#3. Mount your SD Card

Another remedy for Android App not installed error is to make sure that the SD card inserted in your device is not inaccessible.

To check the same:

First, disconnect your Vivo X Flip from your PC and then visit “Settings” on your Android and select “Storage” from the options that appear. Finally, click on “Mount SD Card” at the Storage Info screen.

You can now restart your device and try to install the app now, it should work!

#4. Choose App location wisely

It is advisable to not tamper with the App’s location and let the software decide where it needs to be placed. As far as possible, let the Apps be in your device’s internal memory.

#5. Format SD Card

The chances of your SD Card being corrupted are very high. You can format it either while it is in your device or externally.

Now to Clean up your SD Card, simply visit “Settings” and select “Storage” and tap on “Format SD Card” and mount it once again to use it smoothly.

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#6. App Permissions

You can reset App permissions to combat the Android App not installed error by Visiting “Settings” and then selecting “Apps”. Now access the Apps menu and hit “Reset App Preferences” or “Reset application permissions”. This will allow third-party apps to get installed on your device.

#7. Choose the correct App file

Make sure to always download an App file only from a trusted and safe source to avoid any errors during installation.

#8. Reboot your device

Finally, if nothing else works, restart your device to end all operations which could be causing the said error. To reboot, just press the power button till you see a pop-up. Select “Restart” and wait for your device to reboot.

Conclusion

Encountering the “App Not Installed” error on Android can be frustrating, but by understanding the causes and implementing the appropriate solutions, you can overcome this issue. We saw that Android App not installed error can be fixed quickly if you keep in mind the tips given in this article. However, please ensure that you follow each instruction carefully to avoid any further goof up.

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Gmail Not Working on Vivo X Flip: 7 Common Problems & Fixes

Ever since Android is introduced, it has almost eliminated the need of computers to work through Gmail. Gmail carries much importance especially when you’re a working person. A lot of work is done through mails on daily basis. But maybe today is not your lucky day. Maybe Gmail is giving you a hard time today. Is it? Is your Gmail not responding or keeps stopping you from going further? Well! There is no need to be bothered anymore. We are discussing some of the general Gmail problems along with their fixes. So, if your Gmail is not working on Android, you can go through this article and find the relevant solution.

Problem 1: Gmail App not responding or keeps crashing

First and foremost, the most common situation people meet with is when there Gmail keeps crashing. Or simply, it doesn’t respond at all. When you open it, it stuck for a few seconds and then you have to close it. It seriously is an annoying issue. If your Gmail is also not responding or crashing and you aren’t able to work properly, following are the solution you can follow.

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Clear Cache

The first thing you can do to fix Gmail not responding issue is to clear the cache of Gmail. This has higher chance to get the issue resolved. To do this:

Go to “Settings” and look for “Apps & Notifications”. Please note that the option may vary in some Android phone like it maybe “Application” or “App Manager”. So, don’t panic and look for the option carefully.

![gmail not working android - clear cache](https://images.wondershare.com/drfone/article/2019/04/clear-cache-gmail-1.jpg)

Now, from the apps list, search “Gmail” and tap on it.

![gmail not working android - search gmail](https://images.wondershare.com/drfone/article/2019/04/clear-cache-gmail-2.jpg)

Go to “Storage” followed by “Clear Cache”.

Restart the Vivo X Flip device

Restarting the Vivo X Flip device in the first place simply resolves many problems and so in the instance when Gmail keeps stopping. Simply long press the power button of your device and restart the Vivo X Flip device. See of the problem gets vanished or not.

Factory Reset the Vivo X Flip device

The next option that you can try is resetting your device. This will lead to data loss so we suggest you to take backup firstly and then proceed with this method.

Hit on “Settings” and search for “Backup & Reset” option.
Tap on “Reset” or “Erase all data” (the option name again may vary).

If unfortunately the above solutions don’t work, there is a requirement to flash the stock Android ROM again. Before you wonder how, there is a professional one-click tool that can surely be of assistance. It is Dr.Fone - System Repair (Android) . The tool takes special care of the Android phones and fixes almost every system issues with ease. It takes no special technical skills and performs efficiently.

Problem 2: Gmail won’t sync between all ends

The next most common problem where people get stuck with is when there Gmail won’t sync. Here are the solutions to this particular problem.

Make Space in the Phone

When Gmail stops syncing, one of the things that can save you is clearing the storage. It is the space that maybe the culprit and therefore the syncing don’t work at all. We would like to suggest you removing the unwanted apps to clear the storage or deleting the downloaded files. You can also transfer the important files to your computer and make the space vacant.

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Check Gmail Sync Settings

When still the Gmail not working issue persists and you can’t sync, make sure to check the Gmal sync settings. For this, follow the steps below:

Launch the Gmail app and tap on the menu icon (three horizontal lines).
Tap “Settings” and choose your account.

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![Gmail crashing on Android - find settings](https://images.wondershare.com/drfone/article/2019/04/gmail-sync-settings-1.jpg)

Check the box next to “Sync Gmail” if it’s not checked.

Restart the Vivo X Flip device

Again, restarting can also be helpful in this situation. When you boot the Vivo X Flip device again, check if your Gmail can sync or not.

Problem 3: Gmail won’t load

In case you are using the Gmail over your web browser and it has tested your patience in loading, here are the solutions that could prove to be fruitful for you. Please check these out.

Ensure to Use Gmail Supported Browser

First of all, you need to make sure that the browser you are using works with Gmail or not. Gmail can smoothly perform in Google Chrome, Firefox, Safari, Internet Explorer and Microsoft Edge. However, the browsers should be updated. So, please make sure that these browsers are running on the latest versions. Moreover, in case you use Chromebook, don’t forget to update the operating system in order to let it support Gmail.

Clear Cache of web browser

If you tried the above method but to no avail, try to clear the cache and cookies of the web browser. But by doing so, the browser history will be removed. As well as, the records of the websites you previously enjoyed will also be lost.

Check browser extensions or add-ons

If not the above one, try this tip. It encourages you to check your browser extensions. Perhaps these are interfering with the Gmail and due to this conflict, Gmail won’t load. You can either turn off these extensions and plug-ins temporarily or make use of the incognito mode of the browser where there are no such things like extensions and plug-ins.

Problem 4: Gmail can’t send or receive

Gmail also gives you problem in sending or receive mails and messages. And to troubleshoot such issue, following are the solutions mentioned.

Check the Latest Version of Gmail

This issue is likely to emerge when you are using an outdated version of Gmail. And therefore, the first solution says you to check if the Gmail update is available. You can go to the Play Store and from the “My apps & games” option, you can see if Gmail needs to be updated or not.

Verify Internet Connection

Another thing that carries weight while you can send or receive mails is the internet connection. As we all know that Gmail won’t respond if the Vivo X Flip device is not connected to the internet. Therefore, you are advised to turn off Wi-Fi and then enable it again. Also, please ensure to switch to Wi-Fi if you are using the cellular data. This may hamper the process and stop you from receiving or sending mails.

Remove you Account and Add Again

If still Gmail keeps stopping you to go ahead, make sure to once sign out from it. To do this:

Open your Gmail app and go to “Manage accounts on this device”.

![Gmail crashing on Android - open gmail](https://images.wondershare.com/drfone/article/2019/04/remove-account-1.jpg)

Now, tap on the account you are working with. Tap on “REMOVE ACCOUNT” thereafter. After this, you can again sign in and then check if the problem is gone or not.

Problem 5: Stuck in sending

Now, here is another annoying problem that doesn’t let Gmail working on Android properly. This problem addresses the situation where users send a mail but it gets stuck on sending. If this is the problem that you are going through, the following solutions will help you.

Try Alternative Gmail Address

First of all, if Gmail is not working due to stuck in sending issue, we advise you to make use of some other Gmail address to send the mail. If the problem still occurs, jump to the next solution.

Check Network Connection

As already mentioned, be sure of an active internet connection while working with Gmail. When you are not using a stable connection, it may lead to stuck on sending, Gmail crashing and many other issues. You can fix the issue by doing these three things:

Most importantly, use only Wi-Fi rather than cellular data if you want a smoother process.
Turn off Wi-Fi and then turn it on again after nearly 5 seconds. Do the same with the router. Plug it out and the plug in.
Lastly, turn on Airplane mode and after a few seconds, turn it off again.

Now try to send the mail and see if things are still the same or not.

Check Attachments

Large attachments can also be the reason for this issue. We would here like to suggest you to check the attachments you are sending. If these are not so important, you can remove them and send the mail. Or if it is not possible to send the mail without attachments, compressing the files can be a solution.

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Problem 6: “Account not synced” issue

Many times, the users get the error that says “Account not synced” while they try to work with Gmail. And this is the 6^th problem we are introducing. The ways mentioned below will assist to get out of the trouble.

Make Space in the Phone

When Gmail stops to further the process by prompting “Accounts not synced” issue, be sure that your Vivo X Flip has some storage in it. If not, create it straight away. As we also mentioned in one of the above solutions, you can either delete the unnecessary files or transfer the important files to the PC to make the space in the phone. Go along with this tip and see if it works.

Check Gmail Sync Settings

As another solution, check Gmail sync settings to get the issue fixed.

Simply open Gmail and hit the menu icon which is three horizontal lines on the top.
Go to “Settings” and choose your account.
See the tiny box beside “Sync Gmail” and check it if it is not.

Restart the Vivo X Flip device

If the above method went futile, simply restart your device. Take help of the Power button on your device. Long press it and from the options, restart it. This will hopefully work for you.

Problem 7: Gmail app running slow

The last problem that you may face is the slow-going Gmail app. In simple words, you may experience that Gmail app is operating extremely slowly. To fix this, following solutions will help you.

Restart the Phone

It is a universal method to fix minor Android system issues. And here too, we would like you to restart your Vivo X Flip in the first place when you find that Gmail is not responding due to the sluggish behavior.

Clear Storage of Device

Usually all the apps start running slow when the Vivo X Flip device is not having sufficient space. As the apps need space to function quickly and appropriately, having the Vivo X Flip device on low storage can prove to be a bad luck for Gmail. So, make sure you wipe out the items you no longer needed on your device and create some room so that the Gmail responds nicely and won’t be running slow anymore.

Update Gmail App

As the last tip that will indeed help you is to update the Gmail app. Until you update the app when required, Gmail keeps stopping you from working and you will definitely get frustrated. Therefore, go to Play Store and look for the Gmail update. If it is available, welcome it with smile and bid farewell to the problem of slow running Gmail.

What if your problem still doesn’t get resolved after following these 3 tips? Well! If that is the case, we will again recommend you to make use of an expert one-click tool to flash the stock Android ROM.

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