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[GUIDE] Unlocking JioFi 3 JMR540 & JMR541 for all networks

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abhimortal6

Senior Member
Mar 6, 2014
164
200
Gwalior
Unlocked Firmware for JioFi 3 JMR540 & JMR541

Disclaimer
I am not responsible for any kind of damage to your device.
Use this firmware at your own risk
Post is for educational purpose only.


ONLY FOR JMR 540 & JMR 541


I was able to dump and reverse engineer JioFi 3's firmware to see if I can unlock the SIM restrictions. JioFi 3 is designed by Foxconn it uses generic firmware. Unlocking took time though. Tested with Vi, Airtel.



Guide

Make sure you're on same firmware version
  • JMR 540 - FXN_JMR540_R6.16
  • JMR 541 - FXN_JMR541_R3.10
If not please use the device for sometime it'll autoupdate.


1. Locate your device model and download the respective Firmware and extract it to a known location


2. Install drivers and tools (skip if already installed)

  • Install Fastboot drivers ( google it for mac and linux it's easy to find)
  • Install Fastboot ( google it for mac and linux it's easy to find)

3. Prepare device

  • Remove battery from JioFi 3
  • Locate reset pin hole button
  • Lay down JioFi 3
  • Use Paper Clip / SIM Ejector Tool to press button inside (using sharp object is not recommended)
  • Keep pressing button down and insert USB cable
  • Release button as soon as all the LEDs in Display turns RED. This means device is in boot loader mode

4. Flashing Unlocked Firmware

  • Open adb and fastboot tools terminal
  • Enter following to check if device is connected

  • fastboot devices

  • It will return something like this
  • baxxxxx fastboot

  • This means device is connected. If your device doesn't show up here please check drivers in Device manager
  • Now first erase the system partition

  • fastboot erase system

  • It will return something like this
  • erasing 'system'... OKAY [ 1.104s] finished. total time: 1.105s

  • Now flash the firmware
  • fastboot flash system "D:\system.img" ( replace path )

  • It should return something like this
  • sending 'system' (34306 KB)... OKAY [ 1.276s] writing 'system'... OKAY [ 9.462s] finished. total time: 10.741s

  • Now send reboot command to device
  • fastboot reboot

  • You'll notice device will reboot normally now you can unplug the cable.

Congratulations your device is now unlocked and you can reinsert battery and another SIM for testing.

Firmware will take long time than usual to boot do not panic.

4. Changing APN
  • Insert SIM connect with JioFi 3 wait it to intialize
  • Open Web UI from browser (http://jiofi.local.html/)
  • Now login (default username/pwd is administrator/administrator)
  • In Network Tab you'll find setting for changing APN
  • Put it on manual and enter "internet" as APN (without quotes)
  • Hit apply/save device will reboot again automatically and it'll auto connect
  • Just wait patience is the key here it'll connect.

If something goes WRONG or you want to UNDO you can re flash original firmware which is provided in this post.


Original backup




FAQs

  1. Q. My device is not visible in fastboot devices
    A. Confirm driver installation a faulty cable can also be the issue.
    .
  2. Q. Everything went well but still no changes in dashboard
    A. After successful flash if you still don't see the changes your device is probably booting from recovery partition. Try flashing recovery partition by
    fastboot erase recoveryfs
    fastboot flash recoveryfs "D:\system.img"
    .


  3. Q. After resetting device from pin hole button it shows INVALID SIM.
    A. This is supposed to happen just reboot the device it'll work again.
    .
  4. Q. Can I undo all this and get back to original firmware
    A. Yes just flash the original firmware provided in post and reset the device.







Mentions:
Thanks to
Karuppusamy for testing it on JMR541.


What about JioFi 2, 4, 5, 6?
Reverse Engineering takes lot of time and coffee. Until I get physical access to device I won't be able to unlock it. I'm constantly searching them on OLX as soon as I get hands on I'll surely try to RE and unlock it. I'll update the same here if there is no update here at the time of your reading then I haven't got the device yet so please don't spam for update hope you understand that I don't get anything by doing these things, I do it for liberation of locked hardware to meet it's real destiny and of course for the people. I also have a day job so no I cannot guide or teach you, hope you understand why.



 
Last edited:

sksinha

Member
Dec 2, 2015
6
2
successfully unlocked my jiofi 3 JMR541. tested with voda and its working well and good. Thanks a ton for this bro.
I was late in checking this thread and got shipped airtel unlocked mifi from home.
 
  • Like
Reactions: xda fans155

srbhsngwn

New member
Jun 1, 2021
3
1
Totally working! thanks a ton a bro <3
1622549253651.png
 

abhimortal6

Senior Member
Mar 6, 2014
164
200
Gwalior
there is a issue with JMR540, however I have successfully flashed JMR541 file on friends JioFi 3.
There is definitely a issue with JMR540 system.img file. request @abhimortal6 to check the file and reupload.

I have added a device info details for JMR540
This issue is not related to flash file as I own JMR 540 and it's been tested on multiple devices (refer attached image). "Not working" and "Not flashing" are two different things.
"flash write error" is a sign of bad emmc/nand, bad partition table can also be the cause. Please first try with original firmware and collect information by different permutations (re-downloading image, erasing system before flashing etc) before spamming.
Untitled.png
 
Last edited:

myapky

Senior Member
Nov 2, 2017
56
21
This issue is not related to flash file as I own JMR 540 and it's been tested on multiple devices (refer attached image). "Not working" and "Not flashing" are two different things.
"flash write error" is a sign of bad emmc/nand, bad partition table can also be the cause. Please first try with original firmware and collect information by different permutations (re-downloading image, erasing system before flashing etc) before spamming.
View attachment 5326935
I am not spamming i am facing issue so I mentioned at XDA. I am facing 'flash write error' with the original system.img file too. Unable to flash img files.. Any solution to that ?
 

abhimortal6

Senior Member
Mar 6, 2014
164
200
Gwalior
I am not spamming i am facing issue so I mentioned at XDA. I am facing 'flash write error' with the original system.img file too. Unable to flash img files.. Any solution to that ?
A single post with all the details in it would be sufficient.
As stated in previous post please try the following.
  1. Try flashing original firmware first
  2. Try erasing system partition ( fastboot erase system)
  3. Try re downloading image

If you're getting flash write error in original firmware too then you're nand is probably fried.

try flashing recoveryfs partition

Bash:
fastboot flash recoveryfs "system.img"
 
Last edited:

myapky

Senior Member
Nov 2, 2017
56
21
A single post with all the details in it would be sufficient.
As stated in previous post please try the following.
  1. Try flashing original firmware first
  2. Try erasing system partition ( fastboot erase system)
  3. Try re downloading image

If you're getting flash write error in original firmware too then you're nand is probably fried.

try flashing recoveryfs partition

Bash:
fastboot flash recoveryfs "system.img"
nand was dead...due to all day work on JioFi, now all good thanks for help.
 

dharshan0504

New member
Jun 2, 2021
1
0
Unlocked Firmware for JioFi 3 JMR540 & JMR541

Disclaimer
I am not responsible for any kind of damage to your device.
Use this firmware at your own risk
Post is for educational purpose only.


ONLY FOR JMR 540 & JMR 541


I was able to dump and reverse engineer JioFi 3's firmware to see if I can unlock the SIM restrictions. JioFi 3 is designed by Foxconn it uses generic firmware. Unlocking took time though. Tested with Vi, Airtel.



Guide

Make sure you're on same firmware version
  • JMR 540 - FXN_JMR540_R6.16
  • JMR 541 - FXN_JMR541_R3.10
If not please use the device for sometime it'll autoupdate.


1. Locate your device model and download the respective Firmware and extract it to a known location


2. Install drivers and tools (skip if already installed)

  • Install Fastboot drivers ( google it for mac and linux it's easy to find)
  • Install Fastboot ( google it for mac and linux it's easy to find)

3. Prepare device

  • Remove battery from JioFi 3
  • Locate reset pin hole button
  • Lay down JioFi 3
  • Use Paper Clip / SIM Ejector Tool to press button inside (using sharp object is not recommended)
  • Keep pressing button down and insert USB cable
  • Release button as soon as all the LEDs in Display turns RED. This means device is in boot loader mode

4. Flashing Unlocked Firmware

  • Open adb and fastboot tools terminal
  • Enter following to check if device is connected

  • fastboot devices

  • It will return something like this
  • baxxxxx fastboot

  • This means device is connected. If your device doesn't show up here please check drivers in Device manager
  • Now first erase the system partition (Skip for JMR 540 )

  • fastboot erase system

  • It will return something like this
  • erasing 'system'... OKAY [ 1.104s] finished. total time: 1.105s

  • Now flash the firmware
  • fastboot flash system "D:\system.img" ( replace path )

  • It should return something like this
  • sending 'system' (34306 KB)... OKAY [ 1.276s] writing 'system'... OKAY [ 9.462s] finished. total time: 10.741s

  • Now send reboot command to device
  • fastboot reboot

  • You'll notice device will reboot normally now you can unplug the cable.

Congratulations your device is now unlocked and you can reinsert battery and another SIM for testing.

Firmware will take long time than usual to boot do not panic.

4. Changing APN
  • Insert SIM connect with JioFi 3 wait it to intialize
  • Open Web UI from browser (http://jiofi.local.html/)
  • Now login (default username/pwd is administrator/administrator)
  • In Network Tab you'll find setting for changing APN
  • Put it on manual and enter "internet" as APN (without quotes)
  • Hit apply/save device will reboot again automatically and it'll auto connect
  • Just wait patience is the key here it'll connect.

If something goes WRONG or you want to UNDO you can re flash original firmware which is provided in this post.


Original backup




FAQs

  1. Q. My device is not visible in fastboot devices
    A. Confirm driver installation a faulty cable can also be the issue.
    .
  2. Q. Everything went well but still no changes in dashboard
    A. After successful flash if you still don't see the changes your device is probably booting from recovery partition. Try flashing recovery partition by
    Bash:
    fastboot flash recoveryfs "system.img"
    .


  3. Q. After resetting device from pin hole button it shows INVALID SIM.
    A. This is supposed to happen just reboot the device it'll work again.
    .
  4. Q. Can I undo all this and get back to original firmware
    A. Yes just flash the original firmware provided in post and reset the device.







Mentions:
Thanks to
Karuppusamy for testing it on JMR541.



Hi, i just read ur article on unlocking jiofi 3 and that looked amazing.But i have a jiofi JMR815 and have been looking for help to unlock it from a couple of years.But till date only your post looks promising and i ask yourhelp in helping me unlock my JioFi JMR815.Kindly consider helping me.Also i created an account in XDA just to ask your help

View attachment 5327245

View attachment 5327247

View attachment 5327249
View attachment 5327251
 

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  • 2
    Working fine but only one issue that it is auto updating to official firmware within couple of days and we need to redo the entire process again.
    Any way to stop the auto update of firmware
    1
    Thank you very much @abhimortal6 for the hack. I was successfully able to unlock my JMR541 and use Airtel. I came across an issue which I want to share as there may be others having similar issue.

    I am using Windows 10 Pro as well as Home (2 different laptops). I installed all the pre-requisite software (ADB & Drivers etc) & connected the device in bootloader mode but it failed to install my device & showed a question mark against it in the Device Manager. I tried reinstalling the drivers quite a few times through different versions of ADB Setup as well.

    Also tried to install it via Windows Update but no success. Later, I let the Windows Update check for updates and then to my surprise, an update showed up in Optional Updates for Android Device. I quickly installed it. After installing, it finally detected my device and I was able to complete the process.
    1
    You need to flash your recovery partition as well. Check FAQs of the article.
    Q. Everything went well but still no changes in dashboard
    A. After successful flash if you still don't see the changes your device is probably booting from recovery partition. Try flashing recovery partition b
    fastboot erase recoveryfs
    fastboot flash recoveryfs "D:\system.img" y

    You need to flash your recovery partition as well. Check FAQs of the article.
    Q. Everything went well but still no changes in dashboard
    A. After successful flash if you still don't see the changes your device is probably booting from recovery partition. Try flashing recovery partition b
    fastboot erase recoveryfs
    fastboot flash recoveryfs "D:\system.img" y
    Thanks bro it works
    1
    Hello,

    abhimortal6

    I can't thank you enough for the hard work and effort you put into this project.​

    I myself searched for 2 years😥 for a solution to this problem but finally I'm glad that I came across this forum.​

    All the instructions are simple to follow. (And let me tell you I'm a doctor and have zero computer knowledge and i was still able to follow every step effortlessly)​

    I got my jiofi - JMR 540 working with an airtel postpaid sim with automatic API settings which amazed me.​


    I will be forever greatfull to you.
    You have my respect.
    WE NEED MORE PEOPLE LIKE YOU IN THIS WORLD. :)
    1
    Thanks a lot sir waiting for it since many years .
  • 34
    Unlocked Firmware for JioFi 3 JMR540 & JMR541

    Disclaimer
    I am not responsible for any kind of damage to your device.
    Use this firmware at your own risk
    Post is for educational purpose only.


    ONLY FOR JMR 540 & JMR 541


    I was able to dump and reverse engineer JioFi 3's firmware to see if I can unlock the SIM restrictions. JioFi 3 is designed by Foxconn it uses generic firmware. Unlocking took time though. Tested with Vi, Airtel.



    Guide

    Make sure you're on same firmware version
    • JMR 540 - FXN_JMR540_R6.16
    • JMR 541 - FXN_JMR541_R3.10
    If not please use the device for sometime it'll autoupdate.


    1. Locate your device model and download the respective Firmware and extract it to a known location


    2. Install drivers and tools (skip if already installed)

    • Install Fastboot drivers ( google it for mac and linux it's easy to find)
    • Install Fastboot ( google it for mac and linux it's easy to find)

    3. Prepare device

    • Remove battery from JioFi 3
    • Locate reset pin hole button
    • Lay down JioFi 3
    • Use Paper Clip / SIM Ejector Tool to press button inside (using sharp object is not recommended)
    • Keep pressing button down and insert USB cable
    • Release button as soon as all the LEDs in Display turns RED. This means device is in boot loader mode

    4. Flashing Unlocked Firmware

    • Open adb and fastboot tools terminal
    • Enter following to check if device is connected

    • fastboot devices

    • It will return something like this
    • baxxxxx fastboot

    • This means device is connected. If your device doesn't show up here please check drivers in Device manager
    • Now first erase the system partition

    • fastboot erase system

    • It will return something like this
    • erasing 'system'... OKAY [ 1.104s] finished. total time: 1.105s

    • Now flash the firmware
    • fastboot flash system "D:\system.img" ( replace path )

    • It should return something like this
    • sending 'system' (34306 KB)... OKAY [ 1.276s] writing 'system'... OKAY [ 9.462s] finished. total time: 10.741s

    • Now send reboot command to device
    • fastboot reboot

    • You'll notice device will reboot normally now you can unplug the cable.

    Congratulations your device is now unlocked and you can reinsert battery and another SIM for testing.

    Firmware will take long time than usual to boot do not panic.

    4. Changing APN
    • Insert SIM connect with JioFi 3 wait it to intialize
    • Open Web UI from browser (http://jiofi.local.html/)
    • Now login (default username/pwd is administrator/administrator)
    • In Network Tab you'll find setting for changing APN
    • Put it on manual and enter "internet" as APN (without quotes)
    • Hit apply/save device will reboot again automatically and it'll auto connect
    • Just wait patience is the key here it'll connect.

    If something goes WRONG or you want to UNDO you can re flash original firmware which is provided in this post.


    Original backup




    FAQs

    1. Q. My device is not visible in fastboot devices
      A. Confirm driver installation a faulty cable can also be the issue.
      .
    2. Q. Everything went well but still no changes in dashboard
      A. After successful flash if you still don't see the changes your device is probably booting from recovery partition. Try flashing recovery partition by
      fastboot erase recoveryfs
      fastboot flash recoveryfs "D:\system.img"
      .


    3. Q. After resetting device from pin hole button it shows INVALID SIM.
      A. This is supposed to happen just reboot the device it'll work again.
      .
    4. Q. Can I undo all this and get back to original firmware
      A. Yes just flash the original firmware provided in post and reset the device.







    Mentions:
    Thanks to
    Karuppusamy for testing it on JMR541.


    What about JioFi 2, 4, 5, 6?
    Reverse Engineering takes lot of time and coffee. Until I get physical access to device I won't be able to unlock it. I'm constantly searching them on OLX as soon as I get hands on I'll surely try to RE and unlock it. I'll update the same here if there is no update here at the time of your reading then I haven't got the device yet so please don't spam for update hope you understand that I don't get anything by doing these things, I do it for liberation of locked hardware to meet it's real destiny and of course for the people. I also have a day job so no I cannot guide or teach you, hope you understand why.



    3
    bro is unlocking more 4g bands or manual selection of bands can be done ?
    Totally possible even 3G but it can't be done through WebUI it'll requires shell access.
    2
    Working fine but only one issue that it is auto updating to official firmware within couple of days and we need to redo the entire process again.
    Any way to stop the auto update of firmware
    2
    1622625406032.jpeg

    This is completely genius! I am now able to use Airtel sim on my JioFi! Thanks!
    1
    successfully unlocked my jiofi 3 JMR541. tested with voda and its working well and good. Thanks a ton for this bro.
    I was late in checking this thread and got shipped airtel unlocked mifi from home.