Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (MT6580)

Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (MT6580) 

ViperOS rom is very smooth and stable custom rom available for Lava Iris 821. ViperOS ROM for Lava Iris 821 is google open source android project which is purely based on lineage os. ViperOS ROM for Lava Iris 820 is powered by android nougat 7.1.2 and driven by Linux kernel 3.18.19. ViperOS for Lava Iris 821 is Battery Friendly Custom ROM. ViperOS is well renowned for high performance and reliability. ViperOS ROM is a DeOdexed rom which is also good for gaming as well as daily basis or heavy multitasking performance. This ROM is loaded with some cool features. For additional information, download link and installation method of Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (Nougat 7.1.2) (MT6580), please check out the full article bellow.


Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (MT6580)

Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (MT6580) 

Viperos Custom Rom


ROM Description

ROM Name: ViperOS Rom

ROM Version: V3.1.1

ROM OS: Android Nougat

OS Version: 7.1.2

ROM Base: Lineage OS 14.1

Device: Lava Iris 821

Chipset: Mediatek MT6580 (ARM) (32-bit)

Bootloader: UNLOCKED Bootloader

ROM Kernel: Linux 3.18.19

ROM Status:  Stable and Unofficial

ROM Type: De-Odex

ROM Size: 319.00 MB

ROM  Language: English/ Multi language supported

ROM Contributor: Arafat Ikram Shanto,

ROM Developer:  MT6580 Developer Team, XDA Forum.


ROM Features

  • Nougat Rom
  • Based on LineageOS 14.1 – AOSP
  • Better RAM optimization
  • Better Battery juice backup
  • Brightness slider
  • Brightness icon
  • Customizable icons
  • Clock position
  • Date design
  • Clean ROM
  • Carrier Labels
  • Clock and Date customization.
  • CPU tweaked
  • De-Odexed
  • Data easy toggle
  • Force expanded notifications
  • Heads up customization
  • Lockscreen weather
  • Multi-screen/ Split screen
  • Notifications
  • Network traffic indicators
  • Notification LED control.
  • Omni recent
  • OTA Support
  • PowerMenu customization
  • Everything Working – Ril (Call, Data, SMS) Working, Dual Sim Card, Dual Sim 3G Supported, Wifi, Hotspot, Bluetooth, Data Connection, 2G/3G Switch, Ussd, Mic, Gps, Camera, FM Radio, Vpn, Youtube 720p, Gallery 1080p, Both Storage Mount (Android+PC), Usb Connection, MTP, Audio, Video, Audio Recording, Video Recording, Screen Recording, Offline Charging, Flash-light
  • And So much more…


Known Bugs

  • Some Minor bugs


ROM Demo

Lava Iris 821 Nougat Custom Rom ViperOS Demo Screenshots

Rom Demo Screenshots



Modification of your android device such as Rooting or flashing Custom Recovery/ROM/tweaker’s results to void of the warranty of the device. (We) RaphsonBD and its authorswill not responsible for bricked devices / dead SD-card or any damage in your device which is incurred in the process of installing tweaker/ recovery / rom / firmware / rooting / unlocking or any development process the device. We highly advice you to take a backup of your device prior to performing the process. Please do some research if you have any concerns about features included in this ROM, before flashing it! You are choosing to make these modifications. Nevertheless if you need any help, just comments here. We will always pleased to help you.



You must need a unlocked and Custom recovery installed device to use Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (Nougat 7.1.2) (MT6580).


ROM Download

In order to use the Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (Nougat 7.1.2) (MT6580), first you need to download the Rom from link bellow.


How To Flash ViperOS Rom In Lava Iris 821

  1. At first download and copy the ViperOS Rom file in Internal storage/SD-card.
  2. It’s wise to backup your Current ROM, no matter how confident or experienced you are. So anything happen unpleasant you can retrieve back your old ROM. If you don’t know how to backup ROM using Custom Recovery then Click Here
  3. Then Go to phone’s custom recovery mode. Almost Every phone by pressing Power button + Volume up/down button  button all together you can access your phone recovery options.
  4. After successfully entering the Custom Recovery Option TWRP first & foremost take a backup up of your current ROM. Select “Backup” 》Select storage 》 backup process may take 5/7 minutes.
  5. Then Wipe DataWipe Cache PartitionWipe Dalvik Cache (You shall find it in Advanced option).
  6. After formatting Cache go to Mount and StorageFormat Data, Format System.
  7. Than come back to main menu of  TWRP.  After that just click install the ViperOS Rom from SDCARD. After that flash the Rom patch and GAAP file.
  8. Then Reboot your phone. First boot may take up to 5-10 min.
  9. Voila and enjoy the test of Lava Iris 821 Nougat Custom Rom ViperOS 3.1.1 (Nougat 7.1.2) (MT6580).



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