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[TWRP][RECOVERY] Asus ZenPad 3S 10 Z500M

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By diplomatic, XDA Ad-Free Senior Member on 3rd March 2018, 09:03 PM
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This is mainly a temporary repost of @rakomancha's TWRP announcement in a new thread. He is the maintainer of this TWRP but has not signed into XDA for a while. There is an updated TWRP that I wanted to share. When he comes back and creates his own thread, I will replace this post with a link to his.
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[TWRP][RECOVERY] Asus ZenPad 3S 10 Z500M
The next big step forward for Z500M development is here!
This is the first working custom TWRP recovery for the Asus ZenPad 3S 10 Z500M [P027], based from TWRP v3.2.1.
diplomatic and I had both been working on a port separately, and I offered to test his version. In a few hours we worked out a functional and install-friendly version.
Please NOTE that this is NOT an official TWRP. After this post, I'll be working on making the port official and update here.

ACKNOWLEDGEMENTS
This project, and my own motivation, would not have been possible without the incredible work and input of:
  • diplomatic, who has been instrumental in propelling Z500M development forward. He worked on the issue of perm root and discovered and revealed important intricacies of the Z500M restrictive bootloader. By the end of Dec 2017, he developed a method to unlock the Z500M bootloader based on his amazing work with the Z380M. With amartolos as his testing assistant, the Z500M bootloader unlocking tool was quickly developed and released Jan 5th 2018.
  • overkillZ, who in Sept 2017 introduced us all to rooting the Z500M
  • toineh, who did legwork of establishing temp root by manipulating system permissions & redirecting files through adb. Then he took the boot.img posted by LGiki, explained how to patch it through Magisk and posted the first patched boot image. He also served as a guiding voice on this front.
  • amartolos, who first attempted perm flashing the patched boot image of toineh's method and worked with diplomatic on the developments afterward, which led us to today. Also has served as a guiding voice.
  • LGiki, who was the first to post an extracted WW_27 boot image that got things rolling forward

DISCLAIMER
This image has only been successfully tested by me at this point.
Please exercise caution and care when attempting to flash anything to your device.
You are completely responsible for any possible issues or damages resultant from undertaking the following procedures.
That being said, this image and method should be safe.

REQUIREMENTS
  • ZenPad Z500M tablet, upgraded to Android N
  • Bootloader Unlocked, using Diplomatic's tool. Tablet should be showing Orange State during initial bootup.
  • Root with Magisk installed, Permanent Root preferable
  • BACK UP YOUR INTERNAL USER DATA, in case you need to factory reset
  • TWRP for Z500M recovery image file [twrp-3.2.1-0-z500m.img]
  • Knowledge of adb/fastboot and basic Linux shell
INSTRUCTIONS
  1. Ensure REQUIREMENTS are all met
  2. Ensure to RE-READ all instructions and understand them before starting
  3. Reboot into fastboot mode
  4. do fastboot boot twrp-3.2.1-0-z500m.img, TWRP should boot up in a few seconds. The theme should be blue.
  5. In TWRP, go to BACKUP and back up Boot, Recovery, Data, System and SystemImage. Full backup took me about 10GB of space.
  6. Copy the created TWRP Backup to your PC or an external location for safekeeping
  7. Copy the TWRP twrp-3.2.1-0-z500m.img to tablet storage if not done already.
  8. In TWRP, go to INSTALL, select Install Image and choose the twrp-3.2.1-0-z500m.img. Installation should only take a few seconds.
  9. Unplug from USB and Reboot back into Recovery through the REBOOT menu
  10. If installation went well, TWRP should boot up in a YELLOW theme. From my testing, I'm confident it is functionally the same.

RESOURCES
In this shared folder are
  • TWRP for Z500M recovery image file [twrp-3.2.1-0-z500m.img]
  • version 0.5 of Diplomatic's Unlock Tool
  • diplomatic's Z500M device source

hxxps://mega.nz/#F!SQlyDapC!XbbW0fftZWFfVx2lmL_JUQ [down, get the file below]

GOING FORWARD
I successfully tested replacement of Magisk with SuperSU. My steps taken were:
  • "Completely Uninstall" Magisk through the Magisk Manager
  • reboot directly into Recovery
  • INSTALL a previously downloaded official SuperSU zip file & REBOOT

I very much enjoyed this process of developing for uncharted regions of Android technologies and I owe all of that to the existence of this forum and the people in it. Next, I am reading up on porting a custom ROM, LineageOS looked very nice. I'll update here with significant progress until I get capability to start new forum threads. Thank you all and enjoy delicious functional TWRP custom recovery on your Z500M for the first time in history. Here's to looking forward to development exploding on this device.

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NEW DOWNLOAD
Updated February, 2018
  • Fixes the yellow color rendering in installed mode
twrp-3.2.1-0-z500m.zip

ADDITIONAL WARNING: At first boot of TWRP, it will ask you if you want to keep system read-only. Touch the Keep Read Only button at this screen and only mount system in read-only mode if you need (rarely needed). This is necessary because of dm-verity and is no different than most Android 6+ devices. Unless you have unlocked your bootloader and installed permanent root with dm-verity disabled, mounting the system partition in r/w mode will make changes to it and your tablet will instantly become unbootable.
Attached Files
File Type: zip twrp-3.2.1-0-z500m.zip - [Click for QR Code] (13.90 MB, 5774 views)
The Following 14 Users Say Thank You to diplomatic For This Useful Post: [ View ] Gift diplomatic Ad-Free
13th March 2018, 08:05 PM |#2  
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This is great. Tempted to try this. thanks for the effort!
13th March 2018, 09:22 PM |#3  
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Thank you very much, I did this and also switched to SuperSU with no problems!
19th March 2018, 06:37 PM |#4  
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Hi guys,

I have followed all the steps until 8 but I'm stuck at the install : TWRP ask me what partition to flash
boot, recovery or system image
Which one to choose ? I think it's boot but I don't want to make any mistake

Thanks
20th March 2018, 02:43 AM |#5  
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Quote:
Originally Posted by ratus69

Hi guys,

I have followed all the steps until 8 but I'm stuck at the install : TWRP ask me what partition to flash
boot, recovery or system image
Which one to choose ? I think it's boot but I don't want to make any mistake

Thanks

Well, recovery of course. ...because it's a custom recovery.
20th March 2018, 09:06 AM |#6  
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Hey guys I hope you can help me I had my Z500m partially rooted using the patched Magisk boot method and accidentally erased some stuff before I could permanently root it. Everything snowballed and all I have now is my firmware stored on pc I can get to fastboot mode but I have stock recovery still. can i flash my firmware through fastboot? I’ve been researching and it seems with Mediatek it’s different or at least not as simple. All searches keep coming up for Zenfone and I’m lost. Apologies if Im in wrong area.
20th March 2018, 09:09 AM |#7  
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Quote:
Originally Posted by diplomatic

Well, recovery of course. ...because it's a custom recovery.

Well I'm glad having nothing done until I get a reply from the Master himself
Thanks a lot diplomatic !
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23rd March 2018, 04:52 PM |#8  
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Sorry for stupid query. I have my Asus in Fastboot mode and connot reboot it. Have tried to hold power longer than 1 minute but nothing happen.
What I have to do
23rd March 2018, 04:54 PM |#9  
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Quote:
Originally Posted by mirek54

Sorry for stupid query. I have my Asus in Fastboot mode and connot reboot it. Have tried to hold power longer than 1 minute but nothing happen.
What I have to do

hold volume + and - together for 10s
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2nd April 2018, 09:37 PM |#10  
There was a time that it was unthinkable development. I appreciate the time that cames after. Nice tutorial!
21st April 2018, 10:01 AM |#11  
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Nice work! I've got the Z500KL version of this tablet, so I'm hoping to port twrp to it at some point as well; if you have any tips or advice that might help it would be much appreciated! Although I'm fairly experienced with Linux this would be my first time working with Android, so I'm not sure if I'll succeed, but I thought I'd give it a shot anyway.
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