Download Android ADB drivers here or here
Download SP Flash tool here
Download the Scatter file an CWM Recovery of INFINIX HOT NOTE X551 from here

Download INFINIX HOT NOTE X551 ROM from here.

Extract an install the Adb drivers on your PC.
Extract the infinix hot note X551 files.

Launch Flash_tool from the extracted files.

Click on Scatter Loading on SP Flash tool then select the scatter file of INFINIX HOT NOTE X551 you  downloaded.


Tick only Recovery from the list then click on Location after EMMC_USER of Recovery Line as shown below. Select the CWM Recovery file you downloaded.

Now click Download on SP Flash Tool.

Turn off the device and connect it to the PC holding down vol + button. (This is just to make the PC detect the device easy and start the flashing process.)

The process will take about 30 seconds to complete. When you see the successful sign, unplug your device from the PC.

Copy the extracted files of the Rom  to your sdcard > clockworkmod > backup. (Create these folders if they are not available.)

Insert the sdcard into the device and boot into recovery mode.

Select backup and restore option.

Select restore

Browse through the folders and select the backup file you copied in the memory card.

Wait for the Process to complete then select reboot system now.

First booting after this process might take a while. Be patient ............. ;)

Fix brick LG f160k Korean
First download the minimal flash tools install them Download the package below link or download recovery img from it place it in the folder or minimal fastboot tool
press vol down and power key on phone it ill show fastboot comant mode connect it to usb cable make sure drivers are Installed
now type the comand
fastboot flash recovery recovery.img
after flash type fastboot reboot
now your phone will goto download mode unplug the cable and battery now put bater back in and phone will start up normally if your rom is fine else install rom search on google
it works for me best of luck for you .......
Minimal Fastboot & Adb Download 
Package file Download

Repairing bricked LG F160K is easy with the RIFF Box. The device is based on the Qualcomm MSM8960 chipset.
Note, one simple way to connect over JTAG – connect USB cable to PC and insert battery. In this case phone is automatically powered on.
To resurrect LG F160K:
Solder JTAG cable to LG F160K JTAG pads;
Connect USB cable to phone and PC;
Insert battery;
Make sure LG F160K is selected in the list of models;
Click Resurrect button;
Wait till software signals a successful operation completion;
Disconnect USB cable, de-solder JTAG wires;
Now phone is in bootable condition, that is, even if it does not start up normally, you can flash it using original Samsung downloader software to restore it to the working state.
.

cd Desktop
cd UnrootNexus5
fastboot flash bootloader bootloader-hammerhead-HHZ11d.img
fastboot reboot-bootloader
fastboot flash radio radio-hammerhead-M8974A-1.0.25.0.17.img
fastboot reboot-bootloader
fastboot -w update image-hammerhead-krt16m.zip

8. After that process your phone will automatically reboot, but it might get stuck on the "X" boot animation.

Your phone will now boot up and you are unrooted.