Install two app instances - Samsung Galaxy A51 Questions & Answers

I would like to install two app instances in the A51. Any way to achieve this.
I have tried to install the second instance in secure folder, but it failed .

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Rooting error on Captivate????

I downloaded the root file from here. Installed it in the root directory. When I rebooted into recovery mode and selected "reinstall packages" I got an error saying could not read file, sdcard/update.zip . Then it aborted the install. I had removed the sd card so I would make no mistakes putting it in that directory. Is it possible the recovery mode is looking for the files to be there?
Is it possible that the file is bad??
I found another source for the root file. I have the Superuser Permission icon. It appears that the file was for the Vibrate and i9000 and not right for the Captivate. I saw that others had the same issue on other forums.
I attempted to install a couple games and I still got the infamous we are protecting your phone and unable to install applications other than Android Market.
Is there some other app I need to install to run third party apps???
Quick question, Did you enable Install from non-market sources in the settings?
Under applications I see three filter options. All, Running, and Third party. Third party was selected. Seems like there should be an option for none.
Bear with me guys. I'm new to this stuff. At 53 maybe I'm too old to be trying. It looks like there are a couple ways to run 3rd party apps. One is using android SDK and the other a program called Root Explorer. Which is the best and simplest way to go?????
Maybe I should re phrase the question. Which is he safest way to run 3rd party apps. Are all these changes permanent meaning they only have to be done once. Then I'll always be able to run 3rd party stuff all the time?
I'm sorry if I posted this in the wrong area. Seems like it should be under the Captivate section.

HELP!!

I rooted my phone with kingroot and while i was using the extra rope, i hung myself. The settings.apk in my phone has become somehow damaged, and will not open. The .apk still exists, but every time i try to open settings (directly or otherwise) it closes with a pop-up saying: unfortunately settings has stopped. I also tried to replace kinguser with superSU and failed leaving myself with confusing root access that is only revealed when certain apps like varied root checkers tell me i'm rooted.
I cannot install non market apps because when settings became damaged, the box was unchecked. All i need is to be able to fix the settings.Apk. I don't have a computer and i can't update superSU binary. I have factory reset my device and tried to find solutions onlinen to no avail. I can access the hidden menu and terminal emulator without root. I need to be able to enable non market installation some how. Can anyone help me?
Sent from my LGMS323 using XDA Free mobile app

[Completed] [Q] Malware without opening a shady app?

So, I was trying to download an old xposed module. Upon downloading it, the apk was named as the file I wanted. Once installed, it installed as a download manager with a different name.
I never ran the app and uninstalled it immediately. Could my device have been infected with malware without launching the app?
My backup is over a month old and I would like to avoid a restore
Hi there,
Please read carefully this threads where is discussed about that:
[Guide] Detecting root-level Droiddream malware real-time with Tasker profile
[Guide]A few simple steps to avoid installing Malware
Good luck

Installing application in background

We are trying to implement silent app installation feature for one of our own application.
Following things have been tried -
1. Using Intent for starting the Installation Activity - example stackoverflow.com/questions/4604239/install-application-programmatically-on-android
2. Installing Application as System application(Using adb commands on rooted phone) and using Package Installer-example(stackoverflow.com/questions/26884956/how-to-install-update-remove-apk-using-packageinstaller-class-in-android-l
3. Install application as System Application along with signed certificate(Using Android Studio)-example stackoverflow.com/questions/3635101/how-to-sign-android-app-with-system-signature
So far we haven't been able to implement the silent installation functionality after trying all the above methods.
We have seen some of the OEM devices with an app having this kind of implementations already done(without root) like oppo, moto(implemented by IronSource).
Does any one know how same can be done ? Is there anything else that we might need to do other than what we have done.

App does not install another app

I have installed a downloaded apk from the file manager (by enabling it from the "install unknown apps" menu). The problem is that I want to use this app that I've installed in order to install another app, but it's impossible. The installed app does not appear in the "install unknown apps" menu so I can enable it, and in its properties and permissions it only shows that it can access and modify files. It also does not pop an error message, it just doesn't do anything when i press the install button. The apk itself is not corrupted since it works perfectly on another phone and a tablet (i've also tried re-downloading and reinstalling it a couple of times), I've restarted the phone, I've hard-reset the phone... still nothing. My phone is not rooted (but then again so are the other two devices on which it works perfectly), and there is no antivirus installed. Even the device's security option from the maintainance menu is disabled. Any ideas?
Yes, each app has to be enabled to be able to install other apps. I.e. if you download APK from browser, and try to install it from file manager (i.e. ES explorer or such) it will tell you ES has no permission to install other apps... you have to enable it for each app that is going to install APKs.
Exactly. In order to install the apk I give the necessary permissions to the file manager and it successfully install the app (let's call it app1). But then I need app1 to install another app (let's call it app2) which does not happen in my s8+ (but there is no problem with my other devices which are also not rooted). The problem is that in my other devices app1 appears in the "install unknown sources" menu so it can install app2. On the s8+ app1 does not appear on this menu so there is no way I can give it permission to install app2.
I am not sure, but I vaguely remember that it asked me... I tried installing, and it popped up notification that I need to set permission so I just did... I am not sure where in settings that is

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