Flash firmware on Jackleo Whale Jl553
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How to flash Jackleo Whale Jl553?
Why reinstall the firmware?
Errors in the operation of the Android OS begin to appear.
Some installed applications stop opening.
Many programs from the Play Market do not start.
The phone restarts by itself for no reason.
The phone slows down a lot during operation.
You want to update your firmware.
Where can I find the firmware?
On the phone manufacturer's website.
On specialized services on which developers lay out 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 your SD card into your phone. It must have enough memory to fit the firmware.
Remember your smartphone model.
Fully charge your phone. If the battery runs out during boot, the device will no longer turn on.
Download the archive with Firmware and place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App via the Play Market. And run this application.
At the first start, you need to give consent to future manipulations, as well as consent to granting the Superuser rights to the application. 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, 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.
Press the 'FLASH TO RECOVERY' button and confirm your choice.
The recording process is very fast, and upon completion, the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure can be considered complete.
Write the firmware and other necessary files to the SD card. Using a PC or laptop card reader, it will be much faster.
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. This will delete all user data from the device, but avoid a wide range of software errors and other problems.
Now you can start flashing. Press the 'Install' button.
The file selection screen appears. At the very top there is a 'Storage' button for selecting an SD card.
Select the location where you copied the files. Press the 'OK' button.
Select the firmware file and click on it. A screen opens with a warning about possible negative consequences, you need to check the item 'Zip signature verification', which will avoid using corrupted files when writing to the phone's memory sections.
The procedure for writing files to the device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.
The completion of the firmware installation procedure is indicated by the inscription 'Successful'.
Summary: OS: Android 4.4 KitKat; CPU: Cortex-A7; CPU frequency: 1300.0 MHz (4-core); Chipset: Mediatek MT6582; GPU: Mali-400; GPU frequency: 416.0 MHz (2-core); RAM Memory: 512.0 MB; Display: LCD IPS Color, 540x960 px (5.5") 200ppi; Touch screen: yes; Built-in memory: 4 GB; Memory card: MicroSD/TransFlash max. 32 GB; Camera: 5.04 MPx; Resolution: 2592x1944 px; Flash: LED; Autofocus: yes; Optical zoom: no; Digital zoom: yes; Second camera: 0.31 Mpx; Resolution: 640x480 px; Bluetooth: 4.0; EDGE: yes; GPRS: yes; GPS: yes; A-GPS: no; GSM: 850 900 1800 1900; HSDPA: 850 2100; USB: yes; WAP: yes; Wi-Fi: yes; Audio formats: AAC, MP3; Audio out: Jack 3,5 mm; MP3 player: yes; MP3 ringtones: yes; Polyphony: ye ...
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