How to update the F4/F6 firmware manually

Recently NO.1 releases the F4, the multi-sport mode bracelet.

It is a pity that the companion app Fundo Pro can only support English and Chinese, so does the bracelet. We received some feedback about this, it is important to include other languages in the app. So we’re now doing the translations. But not the bracelet, you know, there are only several words in bracelet, you can even guess the function via the icons. So we are going to release a new firmware for F4, to delete the words under the icons.icon

*This method also works for NO.1 F6, you can download the F6 firmware here* Latest F6 firmware.This firmware improves the pedometer algorithm.

So if you receive a F4 with the words under the icons, if you mind the English display, you can follow this tutorial to update your F4 to a pure version.

  1. Download the Nrf Master Control APP and the firmware here. Or the version 2.3, the latest version 2.6.(this version fixed the pedometer issue.)
  2. Extract the file, install the Nrf Master control app in your phone, don’t unzip the F4_20170826 firmware.
  3. Find the correct Mac address, connect it.
  4. After the connection is successful, click the Unknown service.
  5. Click the unknown characteristic
  6. Input the value 42, click send.
  7. Click the ‘X’ button, then refresh the app to find the DfuTarg, connect it.

  9. Click this button then go to this window to choose the firmware.
  10.  Screenshot_20170828-172723_1 Screenshot_20170828-172723_副本 Screenshot_20170828-172734 Screenshot_20170828-172752_副本
  11. Waiting for the update process


Done. If you failed to update, the bracelet will  reset after 3 seconds it will boot.


73 thoughts on “How to update the F4/F6 firmware manually”

  1. good afternoon,
    I bought a smartband x2 after I gave the error in the update and I used this rom in it, I was able to install the rom but everything was zapped. The screen of the smatband is 96×96 and these were one of the reasons to get bad with this rom (firmware), how could I make a firmware for me? because I can not use my watch.

    1. Hi renan, sorry I don’t know where you can get the firmware for your watch, maybe the seller can help you.

  2. hello dear

    Please could you upload the latest version of firmware? I think is v2.2

    Many thanks

    1. Yes, but everyone said that 0.1.8 version is the best one. :p So you would like to use the latest one? Actually you just need to use the Fundo Pro to update it.

        1. Hello adrianrizaldi, there is a new version. Sorry, I just found I did not put the latest one here. I edited the link, you can now download it there.

  3. No me aparece ninguna ventana al hacer click en características desconocidas para introducir el valor 42, que puedo hacer?

  4. Hi I’m having trouble using the sleep option? It’s not doing anything over night? I’ve tried just leaving it to log manually & I’ve actually tried clicking on the sleep icon to see if it logs it that way. But it’s not logging anything. 🙁
    I’ve also done the latest update. Thanks

  5. Hi I want to translate the interface to Spanish (the date formatt and the days of the week) there is an file where I can get that? Or do you know how can I help you?

    1. Hello Pedro, thanks for your concern. I’ve a question what is Spanish date format, usually we use year/month/day.

      1. Hi, the normal format here (es_MX) is dd/mm/yyyy and also I preffer the 12 hours format with AM, PM, I would love if there are an option for that. Also I don’t know how to update the weather information because sometimes I travel to another places.

  6. HI! I have a problem whit my F4. Do you know anything about Huawei P8 lite connection problem? I can see the watch, but always fail the connecting.

  7. HI! I have a problem whit my F4.after the last update, the application fails to work and can not connect to my f4 bracelet

      1. Hello Bayu, the original charger. And about firmware update, please check the tutorial.

  8. Phat Le Tan

    I just bought two of F6 for me and my wife but i encouraged with a probrem, our app did not save steps and sleep report. And after end call i get a notification.
    I use an adroid phone samsung J7 Prime.
    Please fix this issues asap.
    Thank so much!

    1. Hello Phat, did you find the steps/sleep report on the watch? If it is recorded on the watch, you just need to connect the watch to your phone and make sure the data has synced to the phone successfully.(You can click the Sync button or unbind and reconnect)

  9. hello i try update manually to version 2.6 but after 2% running it unable connect. and now my f4 really die. cannot charging. can you please help me

  10. After updating i to 0.2.6. i dont see charging animation and now i cant see when it is charging but battery is charging. Can you help me with that? Also When I connect bluetooth earhpone band disconnect and need to restart bluetooth or app to work.

  11. Hello. I received the F4 bracelet and I noticed that the pedometer was counting too many steps. I updated it to the last version 2.6 , but now it doesn’t count the steps anymore. Any advice , please?

  12. Just tried firmware 0.2.6, but with this version the pedometer/stepcounter is not working in FunDo. Went back to version 0.2.3, and got it working again.

    1. Thanks for your report, we’ll release a new firmware, please wait for a few days.

  13. Dear Jon, I cannot ask directly on the F5 updating firmware post, so I ask you here.
    1) my F5 actual firmware, checked on the watch, is 1.58.7. On the post “how to update F5 firmware manually” you show a method for Android devices. How can I perform a manual update with an iPhone or a Windows pc?
    2) on the post I read there is an indication of the 1.6.3 and 1.6.6 new firmware versions for the F5. But connectin the eatch to the Hplus app I’m not be able to update the watch firmware, it’s alwais 1.58.7.
    Thanks if you can help me.

    1. Sorry Marangoni, this method only works with Android devices, there is no method works with IOS or windows. To update the firmware, you need to download the firmware apk and connect to the watch via BT, follow the tutorial.

      1. Nikolay Ivanov

        Why you give us only Аndroid method for firmware upgrading?!? I think that when devices work with both iOS and Android OS, you should provide upgrade method for iOS and Android separately. Not every one of us have both iOS and Android device, and I think this does not speak well for you. Do not get me wrong – I really like my F4 device, but I don’t like the need to look for an Android device just to update the software, because I only use an iOS device.

        1. Hello Nikolay, thanks for your suggestion. Because this is the limitation of IOS system, it is not developer-friendly as the Android. 😐 I’m sorry that this kind of method only works with Android device, but you can wait for the release of the firmware, you can go to the Fundo Pro app to update the firmware.

  14. Boa tarde!
    Meu F6 ficou com os pixels todos acesos quando se usa qualquer função.
    Como corrigir

    1. Hello Helderson, I’m sorry, but this is a hardware issue, I’m afraid that firmware update won’t help. 🙁

  15. Nikolay Ivanov

    Since a couple of days my F4 does not show the weather. In Fundo when I tap refresh icon does not refresh and says “No weather yet”. It looks like there is no internet connection but I have mobile and Wi-Fi internet connection.

    1. Hello Nikolay, did you try to reopen it? Or click the refresh button to get an update.

  16. Please, ai need verison 01.8 for no1. f4, these links don’t have this version.

    1. Hello Marcos, I’m looking for this firmware, please wait for my updates.

  17. This update works to DN60?
    It does not update to version 0.2.9 and stays at 0.2.6.
    This version has a lot of problems in connection, its unpair and only connect again with phone reboot.

    1. Sorry, I don’t know what is SN60 and it is not supposed to work with it. Because the firmware is not universal.

  18. Hello, the “FunDo” application has a feature for temperature demonstration. Could not replicate this information on the screen of NO.1 F6?

  19. hi, i update my f6 smartwatch with the above f6 file. now the display shows incorrect symbols. before the update the display was fine. Not all symbols are incorrect but the most. Can you send me the factory firmware that i can repair the screen. Here an example of the display.

    The screen self is not defect.

  20. Hi, I have the F4 and my Blue Tooth is disconnected and I cant seem to get it connected. Please help to solve this problem as the watch is useless without connecting to smartphone.

  21. Francisco antonio

    Hola., como puedo actualizar mi f6. Hay algún video para ver como se hace la actualización manual ? Es que con el tutorial me es muy complicado

  22. Kalin Iliev

    Good day! I saw that the new F4 Color smartband is equipped with 0.2.8 firmware. If this firmware is compatible with the old model F4, please post a link here to update our bands. Thanks!

  23. Hello I have the F6 smart watch and updated to 0.2.5,now the notifications are only in Chinese.
    With the previous firmware I had the notifications in default phone language in Greek.Do you know any solution?
    Thanks in advance

  24. I have bought F4. And the stock firmware before is 0.1.8. But I update to v0.2.3, now at the 0.2.3 version, the battery not enough more than 2 days. Before I update to the last version, battery life more 5 days. Please, where can I get link to download firmware version 0.1.8 for DT NO.1 F4? Thank you.

  25. Ahmad Asrori

    I have f4 smart band color full,but I updated F4 incorrectly, so that become blank
    Bluetooth and touch screen still functions.
    I need firmware no 1 F4 Smart Band Color full,please give me firmware

  26. I want to update F4 but when I did it I by accident downgrade and now I do not have charging animation and connection how to resolve that??

    1. you can update it to latest firmware,but F4 only supports bluetooth update

  27. HI, is there any way of flashing the firmware via cable, because my smart band suddenly started to vibrate indefinitely, and won’t connect to bluetooth at all? Thanks.

  28. Hi,
    In the FunDo app I can find “Firmware upgrade v2.0.1”. How does it correlate with the above firmware versions (like 0.2.6)?
    I have an F4.

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