Flash firmware on TCL J900C
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How to flash TCL J900C?
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 shuts down and restarts 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 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 another medium.
Insert SD card. 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
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.
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.
After adding the image file to the program, click the 'FLASH TO RECOVERY' button and confirm your choice, click 'OK'.
When the message 'Flash Completed Succsessfuly!' appears. Click 'OK'. The TWRP installation procedure is now complete.
Copy the necessary files to the SD memory card. Using a PC or laptop card reader.
Insert a 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.
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.
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 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: Design: Classic; SIM cards standard: Mini Sim - Regular; GSM: 850 900 1800 1900; Other: CDMA 800 EvDO; Dimensions (H/L/W): 145.7 x 74.1 x 10.7 mm, vol. 115.5 cm³; Display: TFTColor (16M) 540x960px (5.0") 220ppi; Touch screen: yes; Weight: 185 g; Time GSM (talk/stand-by): 6 / 120 hrs. (5.0d); Time UMTS (talk/stand-by): 4 / 100 hrs. (4.2d); Battery: Li-Ion 1900 mAh; Built-in memory: 4 GB; Memory card: MicroSD max. 32 GB; RAM memory: 1 GB; Operating system: Android 4.1; Chipset: Qualcomm MSM8625Q; 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: 2.0 ...
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