[Xiaomi Redmi Note 5 / 5 Plus Guides, News, & Discu] vince_user:
I installed a Pixel Experience (Android 10) on my unlocked Redmi Note 5 India / Redmi 5 Plus (Vince) (Here on I'll refer to the device on Vince). Volte and data didn't work, and the call quality was pretty bad, so I decided to go back to the official MIUI and the Mi recovery.

This guide basically explains the easiest way to go back MIUI. Assuming your phone is unlocked. I'm adding direct download links to MIUI and other Mi tools because they are blocked in India.

Download Links:

Link 1: Normal Update ROM (Zip File)[bigota<dot>d<dot>miui<dot>com/V11.0.2.0.OEGMIXM/miui_HM5PlusGlobal_V11.0.2.0.OEGMIXM_f74369de0c_8.1.zip]

Link 2: Fastboot ROM (tgz File)[bigota<dot>d<dot>miui<dot>com/V11.0.2.0.OEGMIXM/vince_global_images_V11.0.2.0.OEGMIXM_20191108.0000.00_8.1_global_90dd70aa99.tgz]

Link 3: Last Updated Stable ROM(zip file)[update<dot>miui<dot>com/updates/v1/fullromdownload.php?d=vince_global&b=F&r=global&n=]

Link 4: Last Updated Beta ROM(zip file)[update<dot>miui<dot>com/updates/v1/fullromdownload.php?d=vince_global&b=X&r=global&n=]

Link 5: MiFlash(rar file)[cdn<dot>alsgp0<dot>fds<dot>api<dot>mi-img<dot>com/micomm/MiFlash2020-3-14-0.rar]

Link 6: Mi PC Suite(exe file)[bigota<dot>d<dot>miui<dot>com/MiFlash/MiSetup2.2.0.7032_2717.exe]

Link 7: This is not a direct link download twrp from one of the servers a direct link TWRP for Vince(img file) [twrp<dot>me/xiaomi/xiaomiredmi5plus<dot>html]

Link 8: This is not a direct link download Unlock tool from the page MIUI Unlock Tool(zip file) [en<dot>miui<dot>com/unlock/download_en<dot>html]

Link 9: This is not a direct link download Orangefox recovery tool from the page Orangefox Recovery(zip file)[orangefox<dot>download/en/device/vince]

Steps:

1. Download MIUI Unlock tool(Link 8) and extract it. Open cmd prompt inside the folder.

2. Switch your phone to fastboot mode (power + volume down). Connect it to your PC.

3. The device should show up when you enter "fastboot devices" in cmd.

4. Download TWRP (Link 7). extract it, rename it to "twrp.img" copy the image and copy it to the MIUI unlock tool. Now run "fastboot boot twrp.img". This should automatically take you to TWRP.

5. Now wipe everything. If you are not able to mount "data". Go to "Wipe", "Advanced", "Repair" then change the format of the data to exFat, then to FAT then to Ext4. This should mount data.

6. You should see your phone on your PC, if not mount USB in TWRP. Download orangefox recovery from Link 9. Copy it and flash it from twrp. Your phone will restart. Go to recovery mode and you should see orangefox.

7. Download fastboot ROM from Link 2. Unzip it copy "persist.img" from the folder to your phone, flash it using orangefox.

8. Download MiFlash tool from Link 5. Extract it and run it. Select the folder where you extracted fastboot ROM. MAKE SURE THAT THE PATH DOESN'T HAVE ANY SPACES OR FLASHING WILL FAIL. Now hit refresh on flash tool. It will show your device, at the bottom there is a selection where you can select the script to be executed. I generally select flash_all.bat, you can select flash_all_lock.bat for a locked OS.

It might show you "error:Not catch checkpoint (\$fastboot -s .*lock),flash is not done", but your phone will boot properly, it will show a success message only if you choose lock option bat. But this error shouldn't affect the installation.

9. Restart your phone, everything should work properly.

Good luck!

Thank you.