Flash firmware on Verykool Lynx II s3503
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How to flash Verykool Lynx II s3503?
Why reinstall the firmware?
The operating system keeps getting errors.
Some applications stop opening.
Many applications from the Play Market do not start.
The phone restarts or shuts down for no reason.
The phone slows down a lot during operation.
You want to update the firmware, as it does not suit you in terms of functionality.
Where can I find the firmware?
On the official website of the manufacturer.
On specialized services on which various 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 another medium.
Insert your SD card into your phone. It must have enough memory to fit the firmware.
Determine your smartphone model.
Fully charge your device's battery.
Download Firmware and Place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App from the Play Market. Download, install and launch the 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.
In the next screen, select the item 'TWRP FLASH' and provide the application with root-rights.
On the main screen of the application, click 'Select Device', and find your phone model.
After selecting the phone, the application will redirect the user to a web page to download the modified recovery environment image file. Download the proposed *.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.
Press the 'FLASH TO RECOVERY' button and confirm that you are ready to start the procedure - press 'OK' in the question window.
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.
Transfer the firmware and other necessary files to the SD card.
Insert a memory card into the device.
To reboot into recovery, you need to enter the menu accessible by pressing the button with three stripes in the upper left corner of the main screen of the application. 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.
You can start flashing. Click the 'Install' button.
The file selection screen is displayed. At the very top is the 'Storage' button, select the location where the firmware file is located.
Select the storage to which the files were copied. Press the OK button.
Find the file we need 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 device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.
When the procedure for installing the firmware is completed, the message 'Successful' appears on the screen.
Summary: OS: Android (4.4); CPU: Single core, 1000 MHz; RAM: 0.25GB; GPU: Yes; Size: 3.5 inches; Resolution: 480 x 320 pixels, 165 PPI; Technology: TFT; Touchscreen: Capacitive, Multi-touch; Colors: 16 777 216; Screen-to-body: 51.04 %; Features: Ambient light sensor, Proximity sensor; Internal storage: 0.512GB; Storage expansion: microSDHC up to 32 GB; Main camera: 2 MP (Autofocus); Front: 1.3 MP; Rear: Single camera; Video recording: 640x480 (VGA) (30 fps); Data Speed: HSDPA plus (4G) 21.1 Mbit/s, HSUPA 5.76 Mbit/s, UMTS; Dual SIM: Yes; UMTS: Bands 5(850), 2(1900); Bluetooth: 2.1; GPS: GPS, A-GPS; USB: microUSB, USB 2.0; Wi-Fi: 802.11 b, g, n; Hotspot; Other: Tethering, Computer sync, OTA sync; Hea ...
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