How to Manual Install Nokia X ROM in Karbonn A9+ / A21 Android Phone – Guide

Excited about Nokia X Android smartphone? Now, before Samsung, LG or say SONY smartphone, Karbonn A9+ Android smartphone or for say Karbonn A21 users can now port the Nokia X android firmware. This means that your Karbonn A9+ or or say Karbonn A21 Android phone’s interface will be looking the same as that of the Nokia X. For doing this, you will have to make sure that you have rooted the device and also you need to follow the list of quick pre requisites mentioned below before we slip into the detailed guide which will help you update the device.

Nokia-X-1 Nokia-X-6 Nokia-X-4 Nokia-X-3 Nokia-X-5 Nokia-X-2

Quick Pre Requisites:

  • All the data in your device needs to be backed up with the help of below mentioned steps manually and not with the PC Suite.

SMS – Use “SMS Backup & Restore app”,
Contacts – Sync with the Gmail application,
Call Log – Call Log and Restore
Images, Songs, Videos, Files – Copy to internal / External SD Card,
APN and MMS Settings – Note down from the path “Applications > Settings > Wireless and Network > Mobile Networks > Access Point Names

  • Head over to the path “Settings > Applications > Development > USB debugging” in your Karbonn A9+ / A21 so as to enable the USB Debugging Mode. Make sure that your device is left with the minimum of 40% of battery life.

You need to make sure that your device is rooted which can be checked with the help of Root Checker app. You can very well download the Root Checker app from the Google PLAY Store.

Disclaimer: We should not be held responsible in any manner for any damage happened to your Karbonn A9+ / A21 due to not following the instructions mentioned in the article.

Once you have backed up all the data in your device, you now will have to proceed to the next step where we have mentioned the detailed guide which will help you update the device.

Procedure to Update Karbonn A9+ / A21 with Nokia X Firmware:

  • Download the Nokia X ROM from here to your computer. Once downloaded, connect your device to the computer with the help of original USB cable and then place the downloaded zip file in your Karbonn A9+ / A21 smartphone.
  • Reboot the device in the recovery mode or the TWRP mode with the help of ROM Manager or manually.
  • Up next, you need to select the option of Wipe Data and Wipe System Cache from the recovery mode.
  • Select Mount System and Data to install the firmware zip file placed in the device and then reboot the device for firmware installation.

Note: If at all your Karbonn A9+ / A21 smartphone gets in the boot loop mode, then you need to turn off the device and then reapply the update from the start. To turn off you can reinsert the battery or say you can long press the power button and repeat the whole process again.

Do let us know in the comments section just in case if you face any issues in the process of firmware update. You have now successfully updated the Nokia X Android firmware in your Karbonn A9+ / A21 smartphone Android smartphone.



  1. sanjeev

    May 30, 2014 at 12:41 am

    hey i m geting Status 7 Error plz help

    • Pradeep Neela

      May 31, 2014 at 6:41 pm

      have you installed in the CWM recovery? If not, you need to install the same.

  2. Pratik patil

    May 27, 2014 at 7:49 pm

    I installed all correctly it also says install complete but then previous os comes out as formatted….

  3. vivek

    May 24, 2014 at 7:46 pm

    i have a rooted karbonn a21 with cwm recovery..
    am getting E verification error (status 7) how to fix it????
    plz help

    • Pradeep Neela

      May 31, 2014 at 7:22 pm

      you need to install the recovery in your device.

  4. vivek Sharma

    May 22, 2014 at 1:13 am

    I tried rooting my phone karbonn a21 through the bin4ry root tool.. After that I got the superuser installed by that process but when I type ‘su’ command in android terminal emulator it says

    app_65@android:/ $ su
    /system/bin/sh: su: not found
    127|app_65@android:/ $

    I think its because the rooting wasn’t successful maybe..

    I even tried it with unlock root but in that case after the status bar says ‘rooting please wait’ the process stops immediately n theres no change in the state if phone….

    Kindly help me with the rooting and mail me about what is to be done

  5. NSG

    May 8, 2014 at 9:19 pm

    I have a Karbonn A9+ installed with rooted rs_ROM_v0.6 firmware with CWM recovery I have installed the downloaded zip file via CWM recovery and the status came that updated successfully. But when i reboot my phone i was unable to see any change except that phone was factory reset. Later i extracted the files & again made a zip file & tried to install but now it shows ‘STATUS 7’ error.

    Do anyone has a valid solution for this issues?

  6. mayank

    May 4, 2014 at 2:10 am

    i am getting status 0 error installation aborted

  7. shoaib

    April 29, 2014 at 6:05 pm

    u need to install cwm on karbon a21 to install Rom

  8. Sameer chaware

    April 16, 2014 at 4:59 am

    I Have A Problem In My Karbonn A21 Device When I Going To Install Any ROM Its Shows E:Signature Verification Failed Tell Me How To Sole The Problem And Also Having Problem In Rooting The Device Via Computer And Mobile I Use Many Software To Root My Karbonn A21 But Its Reboot Not Root Tell Me The Solutions When I’m Gonna Check The Root Using Root Checker It’s Shows Error But When Im Check The Busy Box Its Shows Busy Box Install Correctly Plz Help Me Gives Me Solutions

    Sameer Chaware

  9. sirji

    April 13, 2014 at 1:04 am

    I think, the boot.img file needed to replace with stock or working rom of you mobile rom with the nokia x rom…… then copy that rom file into android mobile internal memory sd card and flash…….

  10. Sazaat

    April 11, 2014 at 7:17 am

    upload this rom on Google drive

  11. Sazaat

    April 11, 2014 at 7:15 am

    uc browser not download with this link upload this rom on google drive ):

  12. swarup

    April 9, 2014 at 8:09 pm

    i have rooted my karbonn A9+ and currently using custom rom.Installation was successful but still i am not able to use this rom.Since i didn’t get TWRP i flashed it through CWM

  13. swarup

    April 9, 2014 at 8:05 pm

    hi..i have rooted my karbonn A9+ and i am using custom rom.But i am not able to use this rom.Installation was successful.What is the problem?
    thank you

  14. Sazaat

    April 7, 2014 at 10:12 am

    i have karbonn a21 and i need this rom but i have 2g internet connection not download from this link so any one please upload this rom in torrent and other link

  15. ankit

    April 7, 2014 at 12:48 am

    hey i m geting Status 7 Error plz help

    • Pradeep Neela

      April 8, 2014 at 12:34 am

      hey ankit, request you to please install the necessary drivers of your phone in your device.

      • ankit

        April 8, 2014 at 1:18 pm

        can u tell me which drivers i need to install

  16. Bala

    April 6, 2014 at 3:28 pm

    when i installed in my karbonn a21
    i got bootloop

  17. swarup

    March 30, 2014 at 11:35 am

    hi i installed it successfully but still i am not able to use it.first of all where i can get TWRP recovery for karbonn? i did it through CWM recovery ,the installation was successful.

    • Pradeep Neela

      March 30, 2014 at 2:00 pm

      you need to first root your device and then the recovery!

    • swapnil

      April 18, 2014 at 2:38 pm

      will u provide link of CWM recovery OR TWRP recovery

      • Pradeep Neela

        April 24, 2014 at 1:10 pm

        its the TWRP recovery

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