LegionOS v3.8 for Poco X3 NFC (Surya) Android 11

May 1, 2021 | By androidhowto@youtube | Filed in: Custom ROM.

How to Install LegionOS v3.8 on Poco X3 NFC (Surya) Android 11. LegionOS is an AOSP based ROM that  offer the maximum possible stability and security, along with essential and useful features for the proper functioning of the device.  Use at your own risk, I’m not responsible for bricking your device.

Download and Terms

  1. Your phone must be Installed Custom Recovery. If not, you can read How to Install TWRP 3.5.0 Xiaomi POCO X3 NFC – Permanent
  2. Download LegionOS-v3.8-surya-20210409-OFFICIAL-VANILLA.zip
  3. Download Magisk: Magisk-f49966d8(22103).zip
  4. Download GAPPS open_gapps-arm64-11.0-pico-20210130-TEST.zip ( Recommended to avoid error 70 )
  5. Download MagiskFix to fix SafetyNet Api Error: app-debug.apk, follow instruction below how to fix SafetyNet API Error
  6. Download Universal SafetyNet fix: safetynet-fix-v1.1.1.zip
  7. Copy ROM to SD Card ( Recommended )

LegionOS v3.8 Install Instructions on POCO X3 NFC:

  1. Enter TWRP Recovery Mode: Turn Power off, Press and Hold Volume Up + Power key, When POCO logo appears release Power key only, keep pressing Volume Up until TWRP Recovery appears.
  2. First Important Step is to Backup (though depends on you if you wanna be safe or no )
  3. Select Wipe – Advanced ( Dalvik, Cache, Data ), Swipe to wipe
  4. Select Wipe – Format Data – type “yes” and confirm ( Optional )
  5. Select Install – select LegionOS-v3.8-surya-20210409-OFFICIAL-VANILLA.zip, Swipe to confirm Flash
  6. Select Reboot – System
  7. Setup the Phone

Install GAPPS

  • Enter TWRP Recovery Mode: Turn Power off, Press and Hold Volume Up + Power key, When POCO logo appears release Power key only, keep pressing Volume Up until TWRP Recovery appears.
  • Select Install – select open_gapps-arm64-11.0-pico-20210130-TEST.zip, Swipe to confirm Flash
  • Select Reboot – System

Rooting, Fix SafetyNet Api Error and Bypass It

  • Enter TWRP Recovery
  • Install Magisk-f49966d8(22103).zip
  • Reboot to System
  • Connect Phone to Internet
  • Safetynet is passed
  • Open Magisk
  • Done

Watch This Video!

LegionOS v3.8 for Poco X3 NFC (Surya) Android 11
Watch this video on YouTube.

Enter TWRP Recovery

You can enter TWRP recovery with 2 methods: via adb command by type “adb reboot recovery” and by pressing keys combinations ( Turn power off, press and hold volume up + Power key, when POCO logo appears release power key, keep pressing volume until TWRP recovery appears )

Notes / Warning!

  1. Use at your own risk, I’m not responsible for bricking your device.
  2. Using the incorrect file may brick your device.
  3. Make sure to backup your important data before root it.


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