[LeEco Le Pro3 Questions & Answers] tsongming:
Stop reading out of date articles, and use the latest Twrp here: https://twrp.me/leeco/leecolepro3.html

The Chinese bootloader issue is no longer an issue

* So to be clear about you issue you cannot boot to recovery.

* You do see you phone when you connect it to the computer...Right?

* BTW, I also have an X727

Your issue is most likely due to corruption and encryption

Backup whatever data you can and then use the All in One ( "AIT " ) tool to remove encryption ( NOTE: this is going to erase your data.

Next Using AIT install Twrp and magisk 17.1 or the easier way to resolve this may be to temporarily go back to stock.

Option 1

Try flashing the latest Twrp and magisk 17.1, using either ADB or AIT

After flashing boot into TWRP recovery

1.	Go to "Wipe" and then to "Advanced Wipe".

2.	Mark "Dalvik / ART Cache", "System", "Data" and "Cache".

3.	"Swipe to Wipe" and proceed back the main menu.

4.	Go to "Install".

5.	Select the ROM zip file and then press "Add more Zips" and select the Gapps zip file, and then the Magisk file.

6.	"Swipe to confirm Flash" and wait for some time.

7.	After the flashing is finished, just reboot to recovery, check boxes to keep Twrp installed

8. Boot to system go through setup.

Option 2

You could flash my Recovery which includes Twrp and Root. ( Instructions at Link Below)

Afterwards you will be able to update the Twrp, and Root, then Flash whatever you want.

Le Eco Pro 3 X727 Twrp Backup : Clean Full Stock X727 recovery EUI 5.8.21s

https://xdaforums.com/showpost.php?p=75021582

Option 3

Use All in One tool to restore my recovery, Flash a Stock Rom , or simply Flash TWRP/ROOT and then your Rom> Gapps> Magisk once again > Reboot to Recovery ( Check Boxes, for Twrp manager installation) Reboot to recovery > do not choose to make you drive read only! Clear Cache ( Not Dalvik) Reboot to system > Finished.

However, there is a faster way: [MENTION=4712355]mauronofrio[/MENTION] created a tool called: "TOOL ALL IN ONE"" and its great!

https://xdaforums.com/and...ctory-t3358711

Its an excellent tool for keeping your drivers and adb up to date. Plus it will give ADB system wide privileges.

Mauronofrio's tool can also unencrypt your storage

After install the All in One Tool

Make sure to check for the AIT program for updates, to the tool itself and to ADB.

Next, click button to allow ADB privileges system wide.

Get more information here:*https://toolaio.tk**

XDA page for Le pro 3 : https://xdaforums.com/le-...1#post71627491

* The all is one tool is excellent and you can use it to install everything you want.

* You can use it to unlock the bootloader.

* Remove Encryption

* Install TWRP,

* Install your Rom, Gapps and Magisk etc.

* The tool will also update your existing installation of ADB, Android Drivers, and provide system wide ADB privileges.

Of course use ADB or AIT once the phone is restored but you would be better off buying an OTG adapter and a USB 3.0 USB Flash drive. This way you can quickly make changes on the fly. I recommend buying at least 32GB usb 3.0 drive. Absolutely, the OTG adapter is the best method, because you will have all of your files available for quick installation and you can make numerous nandroid backups of your favorite rom installations. So If you get bored with one Rom, you can quickly restore another Rom in 5 to 10 minutes.

Again , if you do not use an OTG drive. Just use ADB or AIT for flashing your files, the steps are same as with any other phone.

Finally, look past any typos, I don't have time to proofread after spending so much time on a single post.