Diambil dari website : xda-developers.com
1. What is a "bricked" watch?

A bricked watch does no longer boot. It typically stops at the boot logo and waits forever. This can happen for example, if a flash of the system image failed and the boot image can no longer boot the system.
In such cases, you cannot reach adb from the command line, so there seems to be no way to recover the watch. Fortunately, it has been discovered how fastboot can be entered without a running system.

2. Procedure

Step 1: Get into fastboot
This is the most difficult part. @kiralex1995 has developed a procedure that will lead reproducible to boot the watch into fastboot mode, but it may take many tries (one user reported that it took him 30 min of tries).
Follow this guide: https://forum.xda-developers.com/sma...ectly-t3546829
When you are in fastboot and see the fastboot logo, you have mastered the most difficult part.

Step 2: Choose a ROM to flash on the watch
There are currently three possible ROMs to choose from:
a.) The English AmazFit firmware 1.3.0n
Download the following file on your PC: https://mega.nz/#!xIkC1IQZ!bLLSN9BMv...yUYkatCGKgHeS8
b) The Chinese AmazFit firmware 1.2.5a
Download the following file on your PC: https://mega.nz/#!tNdggR4b!VXmExGqdN...5RidRJP9L-LAXE
c) An old Chinese AmazFit firmware 0.9.50:
Download the following file on your PC: https://mega.nz/#!wY9mEQoI!0ARB0MaK0...HOUquxqFhghg7U

Step 3: Download flash script from xda
Download the attached flash script from this post to your PC.

Step 4: Unpack the archive on your PC
Depending on you PC choose the right method to extract the files in the ROM archive and the flash script.

Step 4: Boot the watch into special recovery
Check that your fastboot drivers see that watch (which should still show the fastboot logo):
'fastboot devices'
You should see your device listed. Otherwise check your fastboot driver installation on your PC. (Note: On Linux you sometimes need to use "sudo fastboot ...".)
Then boot the modded recovery that is included in the archive you unpacked in step 2.
'fastboot boot Amazfit-mod-recovery.img'
You will see a "FAILED" message on your commandline. This is normal.
On the watch you should see the recovery triangle and the text "No command".

Step 5: Transfer the ROM files and the flash script onto the watch
First check that you are now able to connect to your watch via adb:
'adb devices'
You should see your watch listed. Otherwise check you "adb driver" installation. For Windows take care that you use Khoushs universal adb drivers.
Then push the files to the watch:
'adb push boot.img /data/media/0/
adb push system.img.gz /data/media/0/
adb push md5s.txt /data/media/0/
adb push flash_rom.sh /data/media/0/'

Step 6: Enter the shell on the watch and check your files
After you have successfully transferred the files to the watch, you then enter the shell on the watch:
'adb shell'
You should see only a "#", meaning you have full root access.
Now switch drirectory to the sdcard
'cd /data/media/0/
ls'
You should see your files on the "sdcard", including the ones that were pushed before

7. Start flashing the files
Run the flash sccript with the following command on the watch:
'sh flash_rom.sh'
If everything worked correctly, you should see something like:

Validating images

boot.img.gz: OK

system.img.gz: OK

Starting to flash now. DO NOT TURN OFF OR REMOVE THE USB CABLE! Press Enter to continue or CTRL-C to stop!



Flashing boot.img

2304+0 records in

2304+0 records out

9437184 bytes (9.0MB) copied, 2.075793 seconds, 4.3MB/s

Flashing system.img

210944+0 records in

210944+0 records out

864026624 bytes (824.0MB) copied, 107.981352 seconds, 7.6MB/s

Finished

If you see any error message during or after flashing, then DO NOT REBOOT the watch, but get some help or analyse yourself, what went wrong. You can still reflash.

8. OPTIONAL: Delete the dalvik-cache
You can erase the dalvik-cache on the watch with the following command:
'rm -rf /data/dalvik-cache'
This will make the system "re-optimize" all apps when it boots (successfully) the next time. This is optional, as you could always do that later again.

9. Reboot the watch
If everything is ok, then you can reboot the watch
'reboot'

Your watch should boot normally into the flashed system, you downloaded. CONGRATULATIONS, you unbricked your watch!

Link Flash Rom >>klik disini<<

Kelebihan amazfit pace :

1. murah harga sekitar 1.9-2.5jt
   
2. sudah ada GPS
   
3. bisa terhubung dengan bluetooth headset/earset
   
4. bisa upload mp3 tapi dengan kapasitas terbatas
   
5. bisa untuk 8 aktivitas : Run; Walk; Run Indoor; Bike; Bike Indoor; Climb; Trail Run; Elliptical
   
6. bisa ubah bentuk tampilan jamnya, semacam wallpaper atau disebut watchface
   
7. bisa untuk ukur detak jantung baik kontinuitas atau ketika sedang berolahraga
   
8. anti air hingga 10 meter
   
9. baterai standby 7 hari (tanpa aktivitas); 1 hari untuk aktivitas
   
10. fast charging hanya 1 jam
    
11. sinkron otomatis dari aplikasi amazfit ke aplikasi strava
    
12. bisa ganti strap; banyak yang jual di online shop
    

Kekurangan amazfit pace :

1. belum ada garansi resmi di Indonesia, rata-rata garansi seller
   
2. tidak ada penambahan aplikasi seperti apple watch
   
3. part hardware belum ada yang jual di Indonesia
   
4. kapasitas memori hanya 4GB
   

UPDATE FIRMWARE OFFICIAL v.2.8.05 release (via aplikasi amazfit)

New “Apps”:

• Disconnect Alert
  
• Standup Alert (on/off)
  

New Activities:

• Tennis
  
• Soccer
  
• Run indoor
  

New watchface :

• Super Avante
  
• Power Armor
  
• Daylight
  
• Street Art
  
• Time Travel
  
• Fit is fun
  
• Neptune
  
• Everest