[Samsung Gear Fit] LilLowEK:
Hello XDA community! My interest in a smart tracker lead me to the Gear Fit. I purchased one brand new a few weeks ago. Since then I downgraded the firmware, updated the firmware, and recovered my own bricked Gear Fit from using the details and files below. I did not create any of the programs or firmware below. I simply sourced the files out when working on my Gear Fit. All credit and respect goes to the original file and program creators, I believe folks at Samsung. Although all of this information isn't new, I could not locate it all together in one easy to follow format with the necessary files. Put it this way, I wish it existed when I was working on mine. :)

I also wanted to note all of the attached files were scanned with Avast Free Antivirus version 11.1.2245, with virus definition 160225-1, which is the most recent at the the time of this post. Some of the files you will use aren't hosted by me here. Due to this I strongly suggest you scan all the files you download for viruses prior to using them. Lastly, although proven to work for myself, all of the files and details below are meant for guidance only. I am not responsible for anything you do with or to your Gear Fit. Please use and follow at your own risk knowing you are accountable for any and all of the outcome.

With that said, I appreciate the support of XDA so much I always like to give back when I can. Below you'll find guidance for updating firmware from Kies3, how to downgrade or upgrade firmware using ODIN, how to install USB drivers for your computer, and how to unbrick a Gear Fit from a bad firmware flash. Please let me know if anyone has any questions!

Updating Gear Fit USB Driver

Download and install Kies3 from here.

Run Kies3.

Connect the Gear Fit to the computer via charging adapter and micro USB cable.

Click Tools and select Reinstall Device Driver.

View attachment 3659467

Upgrading to the newest firmware via Kies3

Download and install Kies3 from here.

Run Kies3.

View attachment 3659465

Connect the Gear Fit to the computer via charging adapter and micro USB cable.

If it’s giving an error that it’s not being detected please try another USB port. If it’s a desktop computer preferably one in the back that’s attached to the motherboard. If still not being detected please try to unplug it and plug it back in, several times if necessary.

If this still isn’t working you may need to install a Samsung USB Driver for Mobile Phone. Please refer to the Updating Gear Fit USB Driver section in this post.

If a firmware update is available follow the onscreen prompts.

View attachment 3659466

Upgrading or Downgrading from Odin

Download and install Odin3 v3.0.9.5.

Enter download mode on the gear fit by following the instructions in the image below.

View attachment 3659470

Once successfully in download mode run Odin3 v3.0.9.5

View attachment 3659471

Connect the Gear Fit to the computer via charging adapter and micro USB cable. If done correctly it should read that it’s been added in the message window in the lower left corner. The ID:Com port field should also display the Com port.

View attachment 3659472

If not please try to unplug it and plug it back in, several times if necessary.

If it’s giving an error that it’s not being detected please try another USB port. If it’s a desktop computer preferably one in the back that’s built into the motherboard. If this still isn’t working you may need to install a Samsung USB Driver for Mobile Phone. Please refer to the Updating Gear Fit USB Driver section in this post.

If upgrading firmware with 3 .tar.md5 files place the BL in the BL field, AP in the AP field, and CSC in the CSC field. If you are upgrading from a .zip file that contains 1.ex.bin file and 1 .in.bin file only, please place the entire .zip file in the AP field.

Once complete press Start and wait for the message to indicate if it succeeded or if it failed.

Recover Gear Fit after a bad firmware flash (possibly bricked)

If something goes wrong during the Odin flash and you see an image similar to below

View attachment 3659468

you can easily recover the Gear Fit as long as Odin detects it.

Download and install Odin3 v3.0.9.5.

Open Odin3 v3.0.9.5

Connect the Gear Fit with the error into the computer via charging adapter and micro USB cable. If done correctly it should read that it’s been added in the message window in the lower left corner. The ID:Com port field should also display the Com port.

View attachment 3659472

If not please try to unplug it and plug it back in, several times if necessary.

Download the following three files from here and install them in the corresponding slots.

AP: AP_R350XXU0BND8_eng.tar.md5

BL: BL_R350XXU0BND8_user.tar.md5

CSC: CSC_OXA_R350OXA0BND8.tar

Once complete press Start and wait for the message to indicate if it succeeded or if it failed. This has been proven to unbrick a bad firmware flash by me personally.