Flash firmware on Walton Primo EF9
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How to flash Walton Primo EF9?
Why reinstall the firmware?
Errors constantly appear in the Android OS.
Some installed applications do not open.
Some applications from the Play Market do not start.
The phone turns off for no apparent reason.
The phone started to work slowly.
You are not satisfied with the possibilities of the stock firmware.
Where can I find the firmware?
On the official Internet resource of the phone manufacturer.
On certain sites where developers post custom or official OS.
What should be done before installing the firmware?
Back up your contacts and user data and transfer it to your computer.
Insert SD card. An SD card is needed to write firmware to it.
Determine your smartphone model.
Fully charge your phone battery.
Find and download the archive with Firmware. And place it on the SD card.
Installing TWRP Recovery
Download the Official TWRP App to your phone from the Play Market. And install this app.
When you start the application for the first time, you must agree to install the firmware, as well as agree to grant the application Superuser rights and click the 'OK' button.
After moving to the next screen, select the 'TWRP FLASH' item and provide the application with root rights.
On the main screen of the application, click 'Select Device', and select your phone model.
After selecting a device, the application will direct the user to a web page to download the appropriate modified recovery environment image file. Download the suggested *.img file.
After downloading the image file, return to the main screen of the Official TWRP App and press the 'Select a file to flash' button. Then we tell the program the path where the file loaded in the previous step is located.
Press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Transfer the necessary files to the SD card. Using a PC or laptop card reader.
Insert a SD memory card into the phone.
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 'Reboot' and then click on the 'REBOOT RECOVERY' button.
Firmware via TWRP
Before flashing, you need to delete all user data from the phone, this will avoid many problems. press 'WIPE' on the home screen.
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 location where you copied the files. Press the OK button.
Find the file we need 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 flashing the phone will begin, accompanied by the appearance of inscriptions in the log field and the movement of the progress bar.
After the firmware installation procedure is completed, the 'Successful' message appears on the screen.
Summary: OS: Android 8.1 Go Edition; CPU: ARM Cortex-A7; CPU frequency: 1300.0 MHz (4-core); Chipset: MediaTek MT6580M; GPU: ARM Mali-400 MP2; GPU frequency: 416.0 MHz (2-core); RAM Memory: 1 GB; Display: LCD IPS Color (16M), 480x960 px (4.95") 217ppi; Touch screen: yes; Built-in memory: 8 GB; Memory card: microSDXC; Camera: 5.04 MPx; Resolution: 2592 x 1944 px; Flash: LED; Autofocus: yes; Optical zoom: no; Digital zoom: yes; Second camera: 1.92 Mpx; Resolution: 1600 x 1200 px; Bluetooth: 4.2; EDGE: yes; GPRS: yes; GPS: yes; A-GPS: yes; GSM: 850 900 1800 1900; HSDPA: 900 2100 HSPA; HSUPA speed: 5,76 Mb/s; HSDPA speed: 21 Mb/s; USB: 2.0; WAP: 2.0; Wi-Fi: 802.11 b/g/n; Audio formats: AAC, AAC , MIDI, ...
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