Flash firmware on Samsung Galaxy J3 2017 Dual SIM
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How to flash Samsung Galaxy J3 2017 Dual SIM?
Why reinstall the firmware?
Errors begin to appear in the Android operating system.
Some installed applications do not open.
Some applications from the Play Market do not start.
The phone restarts or shuts down randomly.
The phone began to work slowly.
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 certain sites where developers post custom or official OS.
What should be done before installing the firmware?
Create a backup copy of user data, contacts and photos 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.
Find and download the archive with Firmware. And place it on the SD card.
Installing TWRP Recovery
Install the Official TWRP App from the Play Store on your phone.
When you start the application for the first time, you must agree to install a new firmware and all the risks associated with this, as well as agree to grant the application Superuser rights and click 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.
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.
When the message 'Flash Completed Succsessfuly!' appears on the screen. Click the 'OK' button. The TWRP installation procedure is now complete.
Transfer the necessary files to the SD card. Using a PC or laptop card reader.
Insert a memory card into your phone.
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, it is recommended to clear the 'Cache' and 'Data' sections. This will delete all user data from the device, but avoid a wide range of software errors and other problems. You must press 'WIPE' on the main screen.
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 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 phone's memory will begin, accompanied by logging and filling in the progress bar.
The completion of the installation procedure is indicated by the inscription 'Successful'.
Summary: OS: Android 7.0 Nougat; Processor: Samsung Exynos 7570 1,40 GHz; Number of cores: 4; GPU: ARM Mali-T720; RAM memory: 2 GB; DualSIM: Yes; Internal memory: 16 GB; Memory cards: microSD, microSDHC, microSDXC (max 256 GB); Main display: TFT 16M colors 720 x 1280 px (5.00") 294 ppi; Touchscreen: Yes; Digital camera: 13 Mpx; Flash: Yes, LED; Secondary camera: 5 Mpx; Video: H.263, H.264, MPEG4 - 30 fps, 1920x1080 px; MP3: Yes; Speakerphone: Yes; Radio: Yes; Bluetooth: Yes, v4.2; NFC: -; GSM frequencies: 850/900/1800/1900; Standard UMTS: 850/900/1900/2100; GPS: Yes; GLONASS: Yes; WiFi: Yes, v802.11 b/g/n; EDGE: Yes; GPRS: Yes; USB Yes, v2.0; WAP: Yes, v2.0; IrDA: -; LTE: Yes; HSCSD: -; HSDPA: Yes, ...
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