Flash firmware on TCL J738M
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How to flash TCL J738M?
Why reinstall the firmware?
Errors constantly appear in the Android OS.
Apps won't open.
Many applications from the Play Market do not start.
The phone turns off for no apparent reason.
The phone began to slow down a lot.
You are not satisfied with the possibilities of the stock firmware.
Where can I find the firmware?
On the website of your phone manufacturer.
On Internet resources where users 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 your SD card into your phone. An SD card is needed to write firmware to it.
Determine your smartphone model.
Fully charge your device. If the battery runs out during the firmware, the device will no longer turn on.
Download archive with Firmware.
Installing TWRP Recovery
Install the Official TWRP App via the Play Market. And run this application.
When you start the application for the first time, you need to give consent to future manipulations, as well as to give consent to granting the application Superuser rights and click the 'OK' button.
On the next screen, you need to select the 'TWRP FLASH' item and give the application root-rights.
On the main screen of the application, click 'Select Device', and select your phone model.
After selecting the phone, the program will redirect the user to a web page to download the corresponding image file of the modified recovery environment. Download the proposed *.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.
Now 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 can be considered complete.
Copy the necessary files to the SD memory card. Using a PC or laptop card reader.
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 '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 errors in the software, as well as other problems. Press 'WIPE' on the home screen.
You can start flashing. Click 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.
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 flashing the phone will begin, this is 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: Design: Classic; SIM cards standard: Mini Sim - Regular; GSM: 850 900 1800 1900; LTE: Other: TD-SCDMA; Dimensions (H/L/W): 141.3 x 72.4 x 10.0 mm, vol. 102 cm³; Display: TFTColor (16M) 480x854px (5.0") 196ppi; Touch screen: yes; Weight: 160 g; Time GSM (talk/stand-by): 15 / 750 hrs. (31.3d); Time UMTS (talk/stand-by): 10 / 450 hrs. (18.8d); Battery: Li-Ion 2000 mAh; Built-in memory: 4 GB; Memory card: MicroSD max. 32 GB; RAM memory: 1 GB; Operating system: Android 4.2; Chipset: Qualcomm MSM8926; CPU 1 frequency: 1200.0 MHz(4-core); GPU Type: Adreno 305; GPRS: yes; EDGE: yes; HSDPA: no; HSCSD: no; Wi-Fi: 802.11 b/g/n; Bluetooth: 4.0; USB: 2.0; IrDA: no; WAP: 2 ...
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