Database Info

[Q] Help with Rooting

I am currently trying to root my S3 using the instructions from http://forum.xda-developers.com/showthread.php?t=1762709 I got to section 2 where i saw the following instructions. I followed them to the 2 but then at step 6 instead of installing the zip i hit reboot. Now the phone is stuck at the page where it says Samsung Galaxy SIII. This page shows up as soon as I plug the battery in. Did I brick my phone?
Step 2: Download and install the EZ recovery App from HERE (If your coming from section 1 and already have a custom recovery, reboot recovery and skip to step 4).
Step 3: Open app, select CWM recovery, tap the pulldown menu, choose CWM 6.0.1, select flash, then reboot recovery.
Step 4: Perform a Nadroid Backup from the "back up/restore" menu(optional but recomended)!
Step 5: Wipe Data/Factory reset, then under the "mounts & storage" menu Format System.
Step 6: Navigate to "install zip from sdcard", then from there "choose zip from sdcard", and finally install the rom you downloaded in step 1.
Step 7: Reboot.

alnwpi said:
I am currently trying to root my S3 using the instructions from http://forum.xda-developers.com/showthread.php?t=1762709 I got to section 2 where i saw the following instructions. I followed them to the 2 but then at step 6 instead of installing the zip i hit reboot. Now the phone is stuck at the page where it says Samsung Galaxy SIII. This page shows up as soon as I plug the battery in. Did I brick my phone?
Step 2: Download and install the EZ recovery App from HERE (If your coming from section 1 and already have a custom recovery, reboot recovery and skip to step 4).
Step 3: Open app, select CWM recovery, tap the pulldown menu, choose CWM 6.0.1, select flash, then reboot recovery.
Step 4: Perform a Nadroid Backup from the "back up/restore" menu(optional but recomended)!
Step 5: Wipe Data/Factory reset, then under the "mounts & storage" menu Format System.
Step 6: Navigate to "install zip from sdcard", then from there "choose zip from sdcard", and finally install the rom you downloaded in step 1.
Step 7: Reboot.
Click to expand...
Click to collapse
Power off the phone than try holding power+volume up+home button to re-enter into recovery. Once you are in recovery (as long as it is the CWM recovery) continue from where you left off.

X-Note Android 4.4.2 KitKat On Galaxy Note 3 LTE N9005

A complete Galaxy S5 experience on your Galaxy Note 3 with this X-Note ROM based on Android 4.4.2 KitKat. That is what this ROM promises and delivers beautifully. This is indeed the most complete Galaxy s5 experience with Android 4.4.2 KitKat. This ROM also includes some very great mods. It pre-rooted so no need to root it afterwards. Overall its a very stable, fast and smooth ROM. If interested in Android 4.4.2 for other phones, check out our new Custom ROMs section. You can update Galaxy Note 3 LTE N9005 to X-Note Android 4.4.2 KitKat custom firmware using the tutorial below. Your Galaxy Note 3 LTE N9005 should be rooted and have a custom recovery (ClockworkMod recovery / TWRP recovery) installed. This is not an official release by Samsung, but just a custom ROM which would require a custom recovery in order to flash the ROM zip file on your phone.
How To Install X-Note Android 4.4.2 KitKat On Samsung Galaxy Note 3 LTE N9005:
Step 1 - Download X-Note Android 4.4.2 Custom firmware and Google Apps for Galaxy Note 3 to your computer.
Get Download link here:Mod Edit link removed
Step 2 - Connect and mount your Galaxy Note 3 USB memory on your computer using the USB cable.
Step 3 - Now copy/paste the downloaded Android 4.4.2 ROM zip file to your SD card. Make sure the file is in the SD card root (not in any folder).
Step 4 - Then turn OFF your phone and disconnect from the USB cable.
Step 5 - Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up + Home + Power buttons together. You will get an exclamation mark now. Again, hold your Volume Up + Power buttons. You should now be in your Recovery Mode.
Step 6 - Once you are in ClockworkMod Recovery, select perform a full data wipe by selecting “wipe data/factory reset” Use the Power button to select everything while in the Recovery Mode.
Step 7 - Then, perform a cache wipe by selecting “wipe cache partition”
Step 8 - Now this is optional, but it is recommended to perform a wipe of your dalvik cache as well. You will not get into boot loops or any other errors. From CWM recovery, go to ‘advanced’ and then select “wipe dalvik cache”.
Step 9 - Then go back to the main recovery screen and select “install zip from SD card”.
Step 10 - Now select “choose zip from sdcard”. Using your volume keys, navigate to the X-Note Android 4.4.2 KitKat file that you copied to your SD card and select it using the Power button. Confirm the installation on the next screen and the installation procedure should start now.
Step 11 - After the installation completes, go to “+++++Go Back+++++” and reboot the phone by selecting “reboot system now”
Note: Repeat the same step of installation as in step 10 with Google Apps after installing X-Note Android 4.4.2 KitKat.
Your Galaxy Note 3 LTE N9005 will boot now and it might take about 5 minutes to boot on your first time. So, please wait.
That’s it! Your Galaxy Note 3 LTE N9005 should now have X-Note Android 4.4.2 KitKat Custom Rom installed on your phone! Go to Settings > About phone to verify.

saeedashifahmed said:
A complete Galaxy S5 experience on your Galaxy Note 3 with this X-Note ROM based on Android 4.4.2 KitKat. That is what this ROM promises and delivers beautifully. This is indeed the most complete Galaxy s5 experience with Android 4.4.2 KitKat. This ROM also includes some very great mods. It pre-rooted so no need to root it afterwards. Overall its a very stable, fast and smooth ROM. If interested in Android 4.4.2 for other phones, check out our new Custom ROMs section. You can update Galaxy Note 3 LTE N9005 to X-Note Android 4.4.2 KitKat custom firmware using the tutorial below. Your Galaxy Note 3 LTE N9005 should be rooted and have a custom recovery (ClockworkMod recovery / TWRP recovery) installed. This is not an official release by Samsung, but just a custom ROM which would require a custom recovery in order to flash the ROM zip file on your phone.
How To Install X-Note Android 4.4.2 KitKat On Samsung Galaxy Note 3 LTE N9005:
Step 1 - Download X-Note Android 4.4.2 Custom firmware and Google Apps for Galaxy Note 3 to your computer.
Get Download link here: http://idroidhorizon.blogspot.com/2014/06/Install-X-Note-Android-4.4-on-Galaxy-Note-3.html
Step 2 - Connect and mount your Galaxy Note 3 USB memory on your computer using the USB cable.
Step 3 - Now copy/paste the downloaded Android 4.4.2 ROM zip file to your SD card. Make sure the file is in the SD card root (not in any folder).
Step 4 - Then turn OFF your phone and disconnect from the USB cable.
Step 5 - Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up + Home + Power buttons together. You will get an exclamation mark now. Again, hold your Volume Up + Power buttons. You should now be in your Recovery Mode.
Step 6 - Once you are in ClockworkMod Recovery, select perform a full data wipe by selecting “wipe data/factory reset” Use the Power button to select everything while in the Recovery Mode.
Step 7 - Then, perform a cache wipe by selecting “wipe cache partition”
Step 8 - Now this is optional, but it is recommended to perform a wipe of your dalvik cache as well. You will not get into boot loops or any other errors. From CWM recovery, go to ‘advanced’ and then select “wipe dalvik cache”.
Step 9 - Then go back to the main recovery screen and select “install zip from SD card”.
Step 10 - Now select “choose zip from sdcard”. Using your volume keys, navigate to the X-Note Android 4.4.2 KitKat file that you copied to your SD card and select it using the Power button. Confirm the installation on the next screen and the installation procedure should start now.
Step 11 - After the installation completes, go to “+++++Go Back+++++” and reboot the phone by selecting “reboot system now”
Note: Repeat the same step of installation as in step 10 with Google Apps after installing X-Note Android 4.4.2 KitKat.
Your Galaxy Note 3 LTE N9005 will boot now and it might take about 5 minutes to boot on your first time. So, please wait.
That’s it! Your Galaxy Note 3 LTE N9005 should now have X-Note Android 4.4.2 KitKat Custom Rom installed on your phone! Go to Settings > About phone to verify.
Click to expand...
Click to collapse
what is this ?
1) Is this your work ?
2) from the link page you have given to the download page, it refers to your blogspot at Idroid Horizon. And the download link refer to another page which is actually @fahadali2315 work to port the S5, based on Xnote custom ROM (created by @soloilmeglio & @xentrix).
3) If this is not your work, why did you post such thread on the development page ?
4) Your this post never even put any of the dev name. It's not being respectful to the dev.
5) XNote Galaxy S5 port has its own thread already, maintain by the dev himself, and a Q&A thread maintain by me.
and lastly, it doesn't even need Gapps separate installation.
So can you explain further, what thread you are trying to post here ?

He did something wrong, may be he wants to post this on another forum hahahahah
Inviato dal mio SM-G900F utilizzando Tapatalk

soloilmeglio said:
He did something wrong, may be he wants to post this on another forum hahahahah
Inviato dal mio SM-G900F utilizzando Tapatalk
Click to expand...
Click to collapse
Hahahahaha

Never go full retart kid never go full retart
Sent from my SM-N9005 using XDA Premium 4 mobile app

Mod Edit
May I remind you of the XDA RULES # 12
@[OP]...Perhaps you could PM me with your intentions with this ROM
Thank you
Thread closed
malybru
Forum Moderator

[GUIDE] Installing XPOSED on Galaxy S4 SGH-1337M (2017) (WITH PICTURES)

THIS GUIDE IS ONLY FOR GALAXY S4 SGH-1337M
Guide made on 2017-03-12
I AM NOT RESPONSIBLE FOR ANY DAMAGE YOU DO TO YOUR PHONE!
PERFORMING THIS WILL MAKE YOUR WARRANTY GO AWAY!
LEAVE A THANKS IF IT WORKS
This guide is split up into four parts meaning that if you just want to root your phone or just want to restore to stock then you can YOU CAN NOT INSTALL XPOSED WITHOUT ROOTING AND GETTING STOCK FIRST!
Welcome to my guide on how to install XPOSED on the Samsung Galaxy S4 (SGH-1337M) this guide is strictly for the SGH-1337M the reason I made this was because I spent a lot of hours trying to put parts of threads together since no one had specifically made a guide that was simple and noob friendly for installing XPOSED. Another reason is some people feel uncomfortable following guides made for the SGH-1337 mainly because it is different from the SGH-1337M. Another reason was I found no updated 2016/2017 guides for it. Follow every part step by step or you may risk losing your phone.
Also make sure you backup anything that isn't synced with Google that you want to keep, photos, music, contacts. This will delete all data on the phone.
This guide will be split up into four parts:
-Stock
-Root
-ROM that is needed
-Installing XPOSED
Requirements:
-A PC
-Internet
-Samsung Galaxy S4 SGH-1337M
-USB Cable
-SD Card with at least three free GB on it.
Stock Firmware
BEFORE YOU BEGIN (IMPORTANT)
1. Power off device
2. Boot into the stock recovery by holding Power Button+Home Button+Volume Up Button when you see the Galaxy S4 logo then let go of Power Button but keep holding Home and Volume Up
3. Wipe Data/Factory Reset
4. Wipe Cache Partition
5. Power Down
Now you may begin
1. Download the latest stock firmware from sammobile for your device from make sure it is for 5.0.1:
-https://www.sammobile.com/firmwares/database/SGH-I337M/
2. Extract the .zip after you finish downloading
3. Download ODIN v.3.12.3
-Attachment at bottom of thread.
4. Extract the .zip to get the ODIN program.
5. Turn your device off.
6. Boot into download mode by holding Power Button+Volume Down Button
7. When it gives warning press the Volume Up Button
8. Connect device to PC using USB cable.
9. Run ODIN as administrator
10. Your ODIN screen should look like this now:
-http://prntscr.com/ej6hrl
Note: Where it says [0:COM8] The 8 can be any number.
11. Click AP and find the .md5 file you extracted from the stock firmware .zip from earlier.
Note: It is normal for ODIN to freeze while checking the file don't panic and don't close out.
12. On the left hand side where it says options copy down these settings
-http://prntscr.com/ej6ivi
13. When you are done all that it should look like this:
-http://prntscr.com/ej6jmz
Note: My .md5 file or binary size won't look exactly like yours don't panic.
14. Click start
15. It will take a while just be patient and wait, mine took about 10-15 minutes yours might take longer. It should look like this when done and it should reboot automatically:
-http://prntscr.com/ej6nq9
Note: First boot may take a while be patient.
16. Quickly go through setup it doesn't matter what you choose because this isn't the final product.
17. As soon as you finish setup head over to Settings.
18.Go to "More" and click Security
19. Check Unknown Sources
20. Go back to "More"
21. Go to About Device
22. Tap the Build Number until it says developer options enabled.
23. Go back to "More"
24. Go to Developer options
25. Check USB Debugging
26. Turn phone off.
Rooting The Device
1. Download CF-Auto-Root.zip
-http://download.chainfire.eu/327/CF-Root/CF-Auto-Root/CF-Auto-Root-jfltecan-jfltevl-sghi337m.zip
2. Extract the .zip
3. Boot into Download Mode.
4. Connect Device to PC
5. Run ODIN as administrator
6. Your ODIN screen should look like this now:
-http://prntscr.com/ej6hrl
Note: Where it says [0:COM8] The 8 can be any number.
7. Click AP and click the CF-Auto-Root .md5 file that you downloaded
8. On the left hand side where it says options copy down these settings
-http://prntscr.com/ej6ivi
9. When you are done all that it should look like this:
-http://prntscr.com/ej779o
10. Click Start
11. It should look like this when done and it should reboot automatically:
-http://prntscr.com/ej77ok
Note: First boot may take a while be patient.
12. When it starts go to Play Store sign in and download Root Checker by joeykrim
13. Open the app and make sure the phone is rooted
Note: When you click "Check for root" it will ask for SuperUser permission you have 15 seconds to click grant otheriwse it will show wrong results.
14. If it isn't repeat this process again
15. Turn phone off.
Custom ROM that is needed.
General Information:
-Basically XPOSED requires a deodexed firmware and when I wanted to get it I didn't know how to deodex my firmware so instead I found a custom ROM which is very popular and extremely good that has a deodexed firmware.
We can do this two ways, but first we must do this.
1. Power off device
2. Boot into the stock recovery by holding Power Button+Home Button+Volume Up Button when you see the Galaxy S4 logo then let go of Power Button but keep holding Home and Volume Up
3. Wipe Data/Factory Reset
4. Wipe Cache Partition
5. Power Down
Method 1 Downloading ROM using PC then transferring to SD Card
1. Download the GoldenEye ROM from here
-https://www.androidfilehost.com/?fid=23991606952595353
2. Do not extract the .zip
3. Transfer .zip onto SD Card
4. Put SD card into phone
5. Boot phone and go through setup
6. Go to Google Play Store sign in and download ClockworkMod Rom Manager
7. Run the ROM Manager
8. Click Recovery Setup
9. Click ClockwordMod Recovery
10. Click your device.
11. Click "Flash ClockworkMod Recovery"
12. Give Superuser permissions
13. Reboot into Recovery from the ROM Manager
14. Wipe Data/Factory Reset
15. Wipe Cache Partition
16. Go to advanced
17. Wipe dalvik cache
18. Go back
19. install zip
20. Find the GoldenEye ROM from your SD card and install
21. It will start the Aroma installer click 1337M at device selection after you agree to terms.
22. Select GoldenEye Full
23. Go through the rest of the installer choosing your options that you prefer
24. It will take quite a while to install
Note: After it installs it will take a long time to boot do not panic for me it took around 15-20 minutes it might take longer for you.
Method 2 Downloading ROM using Device then transferring to SD Card
1. Boot Phone
2. Go through setup
3. Download the GoldenEye ROM from here using any browser from the Play Store
-https://www.androidfilehost.com/?fid=23991606952595353
4. Do not extract the .zip
5. Move .zip onto sd card using any file manager found on Play Store
6. Go to Google Play Store sign in and download ClockworkMod Rom Manager
7. Run the ROM Manager
8. Click Recovery Setup
9. Click ClockwordMod Recovery
10. Click your device.
11. Click "Flash ClockworkMod Recovery"
12. Give Superuser permissions
13. Reboot into Recovery from the ROM Manager
14. Wipe Data/Factory Reset
15. Wipe Cache Partition
16. Go to advanced
17. Wipe dalvik cache
18. Go back
19. install zip
20. Find the GoldenEye ROM from your SD card and install
21. It will start the Aroma installer click 1337M at device selection after you agree to terms.
22. Select GoldenEye Full
23. Go through the rest of the installer choosing your options that you prefer
24. It will take quite a while to install
Note: After it installs it will take a long time to boot do not panic for me it took around 15-20 minutes it might take longer for you.
Installing XPOSED
We can do this two ways, but first we must do this.
1. Power off device
2. Boot into the stock recovery or CWM recovery by holding Power Button+Home Button+Volume Up Button when you see the Galaxy S4 logo then let go of Power Button but keep holding Home and Volume Up
3. Wipe Data/Factory Reset
4. Wipe Cache Partition
5. Power Down
Method 1 Downloading XPOSED using PC then transferring to SD Card
1. Download the XPOSED Framework and .apk installer from here
XPOSED Framework
-https://www.dropbox.com/s/taywsnvw994uvha/xposed-v86.2-samsung-5.0.x-sdk21-by-dkcldark-arm.zip?dl=1
XPOSED Installer
-Attached at bottom of thread
2. Do not extract the .zip
3. Transfer .zip and .apk onto SD Card
4. Put SD card into phone
5. Boot phone and go through setup
6. Go to Google Play Store sign in and download ClockworkMod Rom Manager
7. Run the ROM Manager
8. Click Recovery Setup
9. Click ClockwordMod Recovery
10. Click your device.
11. Click "Flash ClockworkMod Recovery"
12. Give Superuser permissions
13. Reboot into Recovery from the ROM Manager
14. Wipe Data/Factory Reset
15. Wipe Cache Partition
16. Go to advanced
17. Wipe dalvik cache
18. Go back
19. install zip
20. Find the XPOSED Framwork from your SD card and install
21. It will start the installing
24. It will take quite a while to install
Note: After it installs it will take a long time to boot do not panic.
25. Go through setup process and then install the .apk from the SD card by clicking it using any file manager.
26. It will install
Final
We have finally finished installing XPOSED it was a long process but it was worth it.

Going to be doing some major updates to the steps stay tuned.

[GUIDE] Upgrade P2C72 (already with a42) to Nougat ver. S233

For all those with P2C72 version that came with a42 ROM (version S048) that cannot get Nougat OTA, here's how you can manually do it:
1. Download this file. (1.91GB)
2. Rename the downloaded file to "update.zip". (The file you download is already in zip format, so if you do not have Windows set to show file extensions, just rename to "update").
3. Copy the file (update.zip) to the root of your sdcard that is already in the P2.
4. Turn off the phone. Hold "Vol Up + Vol Down + Power Button". Release the "Power Button" when the phone turns on. The recovery mode will load in about 3 to 4 seconds.
5. In the recovery mode, select "Install Update Package", then "Yes".
6. Allow the phone to restart when the update procedure ends. You're now running Nougat version S232.
7. To get the version S233, download this file. (78.3MB)
8. Repeat steps 2 to 6. (Delete or move the first update.zip to another folder)
9. Time to do a factory reset. Enter the recovery mode. Choose "Wipe User Data". First do "Fuse Wipe Data", then "Fuse Format Data", and finally "Wipe Cache", all the while selecting "Yes" when asked.
10. If you have not already "applied" to have your bootloader unlocked, you can do that now.

Rooting SM-T860 OneUi-3.1 and installing TWRP (UPDATE: Updating to latest version without losing data)

(EDIT)
OneUI 4.1 has finally arrived, if you haven't got your Tab s6 rooted, you can just follow the instructions below. This new part is for the people who followed the guide to root their Tab s6 and now want to update to the new firmware version without losing their data. This guide is inspired in https://forum.xda-developers.com/t/...te-rooted-device-whilst-keeping-data.4245989/. But for simplicity of search I have decided to place it here
(END OF EDIT)
I ran into some problems and took some time to figure out how to install TWRP and root the tablet. The normal procedure by which you flash TWRP and then flash Magisk doesn't work as the download mode won't accept non-official files.
Then, once I got my tablet rooted by the patching method of Magisk, I installed TWRP with their app and got stuck in the logo due to not formatting the data.
After some research and quite a lot of time, I managed to get around that and be able to do everything.
Here is a step by step detailed guide of how to do so.
ATTENTION: These modifications void your warranty and may brick your device. I am in no way responsible for any damage you may cause. Follow this guide at your own risk
Requirements:
-> Latest version of the firmware of your model (I used this site which had the latest version and decent download speeds https://galaxyfirmware.com/model/SM-T860)
(To find which version to download, go into the Phone app, and type *#1234#)
-> Latest Magisk.apk file (https://github.com/topjohnwu/Magisk/releases)
-> Disbale_Dm-Verity_ForceEncrypt zip file (https://zackptg5.com/android.php#disverfe)
-> Latest TWRP img (https://eu.dl.twrp.me/gts6l (europe) or https://dl.twrp.me/gts6l (americas))
-> Official TWRP tool (Play Store)
-> Samsung drivers (https://developer.samsung.com/android-usb-driver)
-> Latest Version of Odin (https://odindownload.com/SamsungOdin)
-> SD Card or Minimal ADB and Fastboot (https://forum.xda-developers.com/t/tool-minimal-adb-and-fastboot-2-9-18.2317790)
(If SD card)
Copy Magisk, AP file from the firmware zip, Disable_dm zip and TWRP img into the SD card, else, you will have to use adb sideload
0. Create a backup of all your data (we are going to wipe the data of the tablet)
(Tablet)
1. Activate developer settings (go to Settings->About Tablet->Software information, and tap 5 times on build number).
2. Go into developer settings and activate OEM unlocking and USB debugging.
3. Turn off the tablet and turn it back on pressing Power + Vol. Down buttons to enter Device Unlock Mode.
4. Press and hold Vol. Up and in the next menu, press Vol. Up to unlock the bootloader (attention, this will erase all of your data)
5. Run through the setup, but be sure to activate the internet (this will prevent the tablet from relocking).
6. Activate developer settings again, and go into it to check that OEM unlocking is greyed out.
7. Install Magisk
(PC)
8. (No SD) Copy the AP file to the Tablet.
(Tablet)
9. Go into Magisk, press Install->Patch a file->Recovery mode (on)->Select file (The AP file).
10. Copy the patched file back into your computer.
11. Shut down the tablet.
12. Press Vol. Up + Vol. Down and connect the tablet to your computer with a USB to enter download mode.
(PC)
13. Open Odin, it should show that your device is connected.
14. Go to the settings tab and uncheck the Auto-Reboot option.
15. Flash all the files of the latest firmware, using CSC (not HOME_CSC) but substituting the AP file with the patched one. (With the WiFi version, you might not have a CP file, don't worry)
CRITICAL STEP (if not followed correctly, may lead to bootloop)
(Tablet)
16. Once the flashing is complete, press Vol. Down + Power during 7 seconds to restart the tablet. As soon as the screen blacks out, swap to Vol. Up + Power (and keep pressing even though it asks to press power) to enter the recovery.
17. In the recovery, navigate to Wipe data/factory reset with the volume buttons and press power button to select. Confirm and reboot.
18. While rebooting, you need to press Vol. Up + Power during 3 seconds (Until the press power to continue appears). This is due to Magisk being installed in the recovery partition.
19. Run through the setup again, but this time you need to login into your google account to enter the Play Store.
20. You should have the Magisk app installed. Open it and it will configure itself.
21. When it reboots, press again Vol. Up + Power for 3 sec.
22. Download the Official TWRP app.
(PC)
23. (No SD) Copy the latest TWRP image previously downloaded into the tablet.
(Tablet)
24. Go into the TWRP app and give it root permissions.
25. Enter TWRP flash and select the latest TWRP img
26. Go into the reboot menu and select reboot recovery.
27. The phone will reboot into TWRP.
28. Tick don't show this message again and slide to allow modifications.
29. Wipe -> Wipe data, Cache and Dalvik and Format data.
30. Reboot -> Recovery.
31. (SD) Flash Disable_DM-Verity zip, and then flash Magisk zip.
32. (No SD) enter the advanced menu and open adb sideload. Connect to the PC, open Minimal adb and fastboot and adb sideload the zip files.
33. Reboot system
Congrats, you have a rooted Samsung Galaxy tab S6 with TWRP installed!
FAQ:
1) Ok, I f* up, I am now stuck in the Samsung logo, what do I do?
Press Power and Vol. Down for 7 seconds, this will auto reboot your tablet. Then, as soon as the screen goes off, try to press Vol. Down + Vol. Up and connect through USB to the PC. With some luck, you manage to get into download mode. If you don't, repeat.
Flash the files with the Magisk modified AP, reboot into recovery and factory reset (follow the next instructions if you want to install TWRP), or else flash the stock rom.
2) I am seeing some screens with some warning messages, is that Ok?
Yes, it is normal, Samsung does that to scare people off from installing modifications on their devices. Can I take them off? Yes, but it is not a simple process. If you really want to, follow this guide, but adapting to the device (https://forum.xda-developers.com/t/...sage-on-samsung-a30-after-root-device.3954589). Another important thing is, when you want to enter recovery, you need to keep pressing Vol. Up + Power, even when the tablet displays the message that asks to press the power button.
3) Don't know... You ask

Works perfectly, thank you!

I have a question: to decrypt the internal memory which files can I flash?