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Flash firmware on Pentagram Rebel 4.0

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How to flash Pentagram Rebel 4.0?


Why reinstall the firmware?

Errors in the Android OS start to appear regularly.

Apps won't open.

Many programs from the Play Market do not work.

The phone restarts by itself for no reason.

The phone slows down a lot during operation.

You want to update the firmware, as it does not suit you in terms of functionality.





Where can I find the firmware?

On the website of your phone manufacturer.

On sites where third-party developers post custom operating systems.


What should be done before installing the firmware?

Create a backup copy of 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 information about 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. 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.

On the next screen, you need to select the 'TWRP FLASH' item and give the application root-rights.

TWRP

On the main screen of the application, click 'Select Device', and find 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.

When the download is finished, you need to return to the main screen of the Official TWRP App and click on the 'Select a file to flash' button. Select the file downloaded in the previous step.

Press the 'FLASH TO RECOVERY' button and confirm your choice.

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 necessary files to the SD memory card. Using a PC or laptop card reader, it will be much faster.

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 the 'Reboot' item, and then click on the 'REBOOT RECOVERY' button. The phone will reboot into the recovery environment automatically..





Firmware via TWRP

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.

Now you can start flashing. Click the 'Install' button.


TWRP

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.



TWRP

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 device's memory will begin, accompanied by the appearance of inscriptions in the log field and the completion of the progress bar.

When the procedure for installing the firmware is completed, the message 'Successful' appears on the screen.





Summary: GSM frequencies: 850 900 1800 1900; Standard UMTS: 900 2100; Standard LTE: no; Type: Touch; Dimensions (W x H x D): 120.00 x 59.50 x 9.50 mm; Main display: Color / AMOLED360 x 640 px (4.00") 184 ppi; Display protection: no; Standard battery: Li-Ion 1200 mAh; Quick battery charging: no; Internal memory: 4 GB; RAM memory: 512 MB; Memory cards: yes, microSD, microSDHC (up to 32 GB); Operating system: Android 4.2.2 Jelly Bean; Processor: MediaTek MT6572; Processor clock: 1.20 GHz; Number of cores: 2; GPU: ARM Mali-400 MP1 @500 MHz; Touchscreen: yes; DualSIM: yes; DualSIM mode: -; Hybrid DualSIM: no; Announced: -; Camera location: Back; Photo matrix: ...

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Pentagram Rebel 4.0