[LeEco Le 1S Guides, News, & Discussion] vishal1286:
This is a guide to revert your phone to a stock rom and recovery from a custom rom

Disclaimar: I have tested this process on my phone and its working perfectly. However, please proceed at your own risk. Neither me nor my cat will be responsible if anything happens to your phone or if a nuclear war starts because of the steps in this guide/tutorial.

Carry out each steps carefully and in order.

Steps-

1)Download the following file, extract it and install the drivers and PDANet from subfolder number 1-

https://onedrive.live.com/redir.aspx?cid=a8c496f804111624&resid=A8C496F804111624!793&parId=A8C496F804111624!788&authkey=!ALSImEVdBsmkGk4&ithint=file,rar

2) Download the offline update package from here and rename it as update-

http://g3.letv.cn/194/1/65/letv-hdt...1S-5.5.012S.zip?b=123456&platid=5&splatid=500

3) Place the offline update package at the root of your internal memory. Make sure the name is update and nothing else

4) Enable USB debugging-

Open Settings > About Phone Then tap “Build number” seven times to enable Developer options. ... Go back to Settings menu and now you'll be able to see “Developer options” there. Tap it and turn on USB Debugging from the menu on the next screen.

5) Connect the phone with the computer using a USB cable and wait till the drivers get installed.

6) Lock bootloader-

Open the folder (vishal1286) you downloaded and go to folder 3 > adb. On the computer keyboard press & hold the shift key and right click on the mouse. Now click on "open command window here". In the command window type- adb reboot bootloader Once the phone boots into the bootloader mode, type- fastboot oem lock. Wait for sometime and press the Volume Up button once. Your bootloader will be locked now. Now switch off your phone by pressing and holding the power button of the phone for ten seconds. (Repeat this process of switching off your phone if it powers back on.) Remove the USB cable from the phone.

7) Select scatter file-

Open the folder (vishal1286) you downloaded, go to folder 3 > SP-Flash-Tool-v5.1532.00 and double-click on flash_tool.exe

8) Select scatter file- Click on Scatter-loading and select the scatter file from subfolder 2.

9) Select Userdata.img-

Untick recovery from the populated list below and make sure userdata is ticked. Now click on the download button. Keep pressing the Volume down key and attach the USB cable to the phone. The process of flashing will start and at the bottom you will first see a red bar and then a yellow bar. When it successfully completes you will get a succcess popup. Click on OK in the popup. Remove the USB cable from the phone.

10) Select recovery.img-

Untick userdata from the populated list below and make sure recovery is ticked. Now click on the download button. Keep pressing the Volume down key and attach the USB cable to the phone. The process of flashing will start and at the bottom you will first see a red bar and then a yellow bar. When it successfully completes you will get a succcess popup. Click on OK in the popup.

11) Flashing stock rom-

Press and hold Volume up button and power button together till the phone boots in recovery mode. Select "Update System" and uncheck Clear Data. (If you get a warning click on OK.) Now click on start. The flashing of stock rom will start.

12) Additional Step-

If you are coming from an another rom or if you want a clean phone, its better you do a factory reset. Press and hold Volume up button and power button together till the phone boots in recovery mode. Select "Clear Data" and uncheck Update System. (If you get a warning click on OK.) Now click on start. Once its reset. Click on restart. Dats it.

Credits: naeem210 from Letv India Forum