Flash firmware on Samsung Galaxy A9 Pro 2019
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How to flash Samsung Galaxy A9 Pro 2019?
Why reinstall the firmware?
Errors begin to appear in the Android operating system.
Some installed applications do not open.
Many applications from the Play Market do not start.
The phone turns off for no apparent reason.
The phone slows down a lot during operation.
You are not satisfied with the functionality of the stock firmware.
Where can I find the firmware?
On the official website of your phone manufacturer.
On specialized services on which various developers lay out 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 your SD card into your phone. It must have enough memory to fit the firmware.
Find out the exact model of your smartphone.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Download 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.
After moving to the next screen, you need to select the 'TWRP FLASH' item and give the application root rights.
On the main screen of the application, the 'Select Device' drop-down list is available, in which you need to find and select the device model for installing the recovery.
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.
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.
Now press the 'FLASH TO RECOVERY' button and confirm your choice, press 'OK'.
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 in recovery, it is convenient 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 tap 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.
Everything is ready to start flashing. Press the 'Install' button.
On the file selection screen, at the very top there is a 'Storage' button for selecting an SD card.
Select the storage to which the files were copied. 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 damaged files during recording.
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 installation procedure is indicated by the inscription 'Successful'.
Summary: OS: Android 8.1 Oreo; Processor: Qualcomm Snapdragon 710 2,20 GHz; Number of cores: 8; GPU: Adreno 616; RAM memory: 6 GB; DualSIM: Yes; Internal memory: 128 GB; Memory cards: microSD, microSDHC, microSDXC; Main display: IPS TFT 16M colors 1080 x 2340 px (6.39") 403 ppi; Touchscreen: Yes; Digital camera: 24 Mpx; Flash: Yes, LED; Secondary camera: 24 Mpx; Video: H.263, H.264, MPEG4; MP3: Yes; Speakerphone: Yes; Bluetooth: Yes, v5.0; NFC: -; GSM frequencies: 850/900/1800/1900; Standard UMTS: 850/900/1900/2100; GPS: Yes; GLONASS: Yes; WiFi: Yes, v802.11 a/b/g/n/ac; EDGE: Yes; GPRS: Yes; USB Yes, v2.0; WAP: Yes, v2.0; IrDA: -; LTE: Yes; HSCSD: -; HSDPA: Yes, 42.20 Mbit/s; HSPA: Yes; HSPA: Yes; H ...
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