Flash firmware on Jesy J9
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How to flash Jesy J9?
Why reinstall the firmware?
Errors start to appear in the operating system.
Some installed applications stop opening.
Many programs from the Play Market do not start.
The phone restarts by itself for no reason.
The phone is slow.
The OS does not match the system requirements of the smartphone.
Where can I find the firmware?
On the phone manufacturer's website.
On specialized services where users post custom or official OS.
What should be done before installing the firmware?
Create a backup copy of user data and transfer it to your computer.
Insert an SD card into your phone to write the firmware to it.
Find information about your smartphone model.
Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.
Find and download the archive with Firmware.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone. And run this application.
When you start the application for the first time, you must consent to future manipulations, as well as consent to granting the application Superuser rights. Check the checkboxes and press the 'OK' button.
Going to the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, select 'Select Device', and find your phone model.
After selecting a device, the program redirects the user to a web page to download the corresponding image file of the modified recovery environment. Download the suggested *.img file.
When the file is loaded, you need to return to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Select the file downloaded in the previous step.
Click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK' in the question window.
After the burn process is complete, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete..
Copy the required files to the memory card. Using a PC or laptop card reader.
Insert a SD memory card into the phone.
To reboot into recovery, you need to use a special item in the Official TWRP App menu, accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. We open the menu, select the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically.
Firmware via TWRP
Before flashing, you need to clear the 'Cache' and 'Data' sections, press 'WIPE' on the main screen. You will delete all user data from the phone, this will avoid software errors and other problems.
Now you can start flashing. Click the 'Install' button.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the storage to which the files were copied.
Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, as well as the item 'Zip signature verification'. This item should be checked by placing a cross in the check-box, which will avoid using damaged files when writing to the phone's memory sections.
The procedure for writing files to the phone's memory will begin, this is accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: Brand & Model: Jesy J9; Product Release Date: 28 June, 2017; Fingerprint Sensor: Yes; Waterproof: Yes; Display Type: IPS, LCD capacitive touchscreen; Display Size: 5.5 inches HD; Resolution: 1080 x 1920 Pixels, 24 bit color depth; Multitouch Input: Yes; Display Colors: 16M Colors; Pixel Density (In PPI): ~ 401 PPI Pixel Per Inch; Touch Screen: Multi Touch Support; Touchscreen Technology: Capacitive Touch; Display Protection: with Corning Gorilla Glass 4; Features: FHD Display~ 401 PPI Capacitive Multi-touchCorning Gorilla Glass 4Scratch Resistant; Secondary Display: No; Screen to Body Ratio: 58.96%; Camera Type: Dual Camera Set UP (One Front One Back); Rear Camera: 16 Me ...
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